ESP User Manual V4a DH
Contents
1. eaglet eye com Eaglet Eye User Manual EMPLOYER MANUAL How to get the best use out of me Lets get to work Measurement system for the Anterior surface of the eye eaglet eye com 2 vu D Un D gt LLI 4 E o LLI Introduction Thank you for purchasing this Eye Surface Profiler ESP system and for your confidence in Eaglet Eye The ESP gives you highly precise measurements of the front surface of the eye not only of the cornea but also a large part of the sclera We are committed to assuring your complete satisfaction with the ESP At Eaglet Eye we continue our research and development to further extend the capabilities of all our products and solutions This may result in improvements of certain features of the ESP system that have not yet been updated in the user manual We strive to minimize these differences and come with regular updates of the manual For your safety it is essential that you read this manual carefully and that you familiarize yourself with its content before you start using this device In particular pay close attention to the safety instructions in this manual If you have any questions or desire further information on this product please contact us via the website or email us Our team will be glad to help you The Eaglet Eye team eaglet eye com C o MS D Un ED D gt LLI O LLI Description2. Raw height data with pare o C gt u D Un ED D gt LLI 4 E g9 LLI To compare files just select two measurements from the right bar and click the comparing files option on the left box below the different maps bar It is possible to compare two measurements from any day of one patient It is not possible to compare measurements from several patients to each other There are three options to compare results 54 1 Difference ax E a ir um LES mee M LL s mi m Lua m dae m Rl m ua a ie i ign sS d E TE i F i i F 8 d eaglet eye com o g9 vL D Un ED D gt LLI 4 E g9 LLI mmr mi mr E ii mmr Co F E mic ar 55 eaglet eye com g9 o u D Un ED D gt LLI 4 E g9 LLI Lens Design Module Warning This lens design module is merely a simulation to better understand the shape of the eye and cannot be used to manufacture actual lenses Clicking this button will open the lens design module In the left box shape the eye care practitioner can fill in pma ool 7 mai aim md nem i i ix iii eed Fees gt E 2H 1 ti I TH i E o o B LE curvature values and sagittal height on four different zones or more After clicking the calculate button these values will be calculat
3. i iti PREPRS eee hee The ESP is a profilometry based system and provides a qualitative and quantitative evaluation of corneal curvature of the whole cornea An elevation map shows the measured corneal height from which a best fitted reference sphere has been subtracted This map shows the true shape of the eye Quad map PESEERCEREEEES Et eaglet eye com The quad map displays the grid map tangential curvature map corneal elevation map and bisphere elevation map at the same time to compare those four Notes TOA 13 THE E g9 mD C o i D Un ED D gt LLI E O g9 LLI The notes map can be used to describe the measurement or to report on the patient 50 Evaluating functionalities By right mouse clicking on the picture different evaluating functionalities appear Show eye allows to view the measured surface on the eye with the translucency of your choice HVID shows the Horizontal Visual Iris Diameter e None deselects all previous clicked options e Limbus draws a circle around the calculated limbus e Pupil indicates the location of the pupil on the map Conic indicates the flat and steep curves of the eye Grid shows the compass rose angles e Values shows a grid of spot values on the map e Scleral angles shows the scleral angles of the eye measurement e he asphericity is calculated at 15 degrees intervals eaglet eye com Any map or
4. g9 LLI 58 eaglet eye com g9 cC g9 gt u D Un ED D gt LLI 4 E gt g9 LLI 59 8 Maintenance and Service Care and maintenance Casing When cleaning always pull out the plug Do not use any aggressive cleansers which contain chlorine solvents abrasive or caustic substances It is best to clean the surface of the casing with a soft cloth and an anti static cleansing agent Otherwise wipe off outer surfaces with a damp cloth In case of residue remove with a mixture of equal parts of spirit and distilled water with a small dose of conventional detergent Optical components There are no parts inside the instrument which should be cleaned by the user Opening the casing without explicit authorization by Eaglet Eye will void the warranty Software installation Eaglet Eye service department will provide you with the necessary software installation file s and thereafter with the required software update file s These will be in the form of msi files and will come with complete step by step instructions eaglet eye com g9 cC D Un ED D gt LLI 4 E g9 LLI Before installing a new version please ensure that you de install the older version first through the Windows Control Panel To remove the older version please follow these steps Open Programs and Features by clicking the Start button then clicking Control Panel next clicking Programs a
5. 1EC dE X26 1 2008 CI OSOR CP teu ret marker 0503 13 240 EGR 06 SO gt LS Y o Emrine Compebenos Centre mis Than ede nd B gt fx Bem d Hi 550 aD Hetgelo RS MERE gt u D Un ED D gt LLI 4 E LLI 42 eaglet eye com o g9 gt u D Un ED D gt LLI 4 E gt g9 LLI 45 Index Area Analyzed AA The simulated index is the ratio of the actual data area to the area circumscribed by a circle 4 5 mm in radius Average Central Power ACP ACP is simulated as the average dioptric power of all points within the central 5 mm Central Surround Index CSI The simulated center surround index reports the difference between the average area corrected power between the central area 5 mm diameter and an annulus surrounding the central area 5 6 mm Differential Sector Index DSI The simulated differential sector index reports the greatest difference in average area corrected power between any two 45 sectors Irregular Astigmatism Index IAI Irregular astigmatism index is simulated as the average Summation of area corrected dioptric variations along every semi meridian for the entire analyzed surface and normalized by the average corneal power and number of all measured points IAI I semi meridional position j point location relative to center Pi j corneal power on the point i j A area which corresponds to
6. D gt LLI 4 ES gt g9 LLI 15 Finding an existing patient A patient can be found in the ESP software by entering the given name or family name in the Name input field Search results The patients matching the criteria will appear in the search results while typing You can select the patient by clicking the name from the results You can also search by added notes for example keratoconus History When no data is entered in the Name input field the most recent selected patients are listed in the Left column eaglet eye com Cc o rums D Un D gt LLI 4 E gt o LLI Viewing results Results can be selected in the Results column By default the ESP Software lists the measurement sessions by date When a patient is selected from the left column measurement sessions of this patient are listed only A measurement session can be expanded O DAE pE A A OR n O DORMDPRORGEEGCA E UP DUNT A E Parameters The following figures will display the functionalities and parameters of the Bisphere 3D ESP software TEE Tangent angles 3D Height Height 3D Flue simulation Axial curvature Refractive power Corneal elevation Quad map Notes 16 Refractive Sphere The Maloney spherocylinder is used Spherical sphere equivalent corresponds to the plus half of the cylinder Astigmatism Astigmatism The refractive e
7. ED D gt LLI O O g9 LLI Bisphere 5D mei a mhi EH 1 Pals a i ERI uma E T E ma ama Ri The bisphere 5D map enables the operator to look at the surface of the eye in 5D in micron precision Tangent angles map This map shows the surface of the eye in tangent angles and is able to point out the limbal area In the parameter list the inner edge of the limbus and limbus width is indicated 24 Tangent angles 5D map i SB p r ox Ear 511 F m i ad LL n 1 titii UN Je TETIT rey eaglet eye com The tangent angles map is also offered in 5D version The colour scale of the tangent angles maps can be adjusted and therefore customized to the preferences of the eye care practitioner Tangent angles are important to establish the exact landing zone of the lens The tangent angles are measured at every meridian and at every chord length o zm o D Un D gt LLI 4 ES g9 LLI In the height map the details of the sagittal heights are displayed in a 2D map These are the raw data 25 eaglet eye com g9 gt uM D N D gt LLI O O g9 LLI Height 3D In the height 5D map the details of the sagittal heights are displayed in a 5D version Fluorescein simulation map The Fluorescein simulation map indicates a simulation of fluorescein patterns of a contact len
8. T gt D Tum LU O CO D Note that eccentricity e cannot distinguish between oblate and prolate ellipsoid However e2 is negative for an oblate ellipsoid and e2 is positive for a prolate ellipsoid Best fit Bisphere gt gt T N zm eD gt LLI Inner radius After subtracting a best fit sphere from the A corneal part the inner radius gives information LLI about the radius of the inner sphere the corneal sphere Limbus The limbus is indicated from the differences between the corneal and the scleral best fit spheres There are two spots in the cross section where the two best fit spheres interfere see picture above the squares surround these two spots The first number displays the mean distance from apex to the center of the interfering part of the two best fit spheres 18 eaglet eye com o mD cC 2 vu D Un D gt LLI 4 E o LLI 19 Outer radius Keratoconus KPI Warning Pupil Limbus HVID Pupil Pupil offset PAP PAP PAC PAC Footnotes corneal and scleral The second number represents the mean length of this interfering area This is still an indication After subtracting a best fit sphere from the scleral part the outer radius gives information about the radius of the outer sphere the scleral sphere The keratoconus prediction index is a compilation index of DSI OSI CSI SAI SimK1 SimK2 IAI a
9. has to be a mapped drive for example C F This opens the possibility to open the database on different locations eaglet eye com mD gt uc D Un D gt LLI 4 E o LLI In this screen see picture below it is also possible to select a database if the eye care professional saved several databases The Eye Surface Profiler software home screen consists of three columns Column Description Customer column From this column recent customers can be selected as well as new patients that can be added New measurement Enables access to new measurements if a patient is column selected Results column Contains a list of recent measurements 10 eaglet eye com o gt i D Un D gt LLI O O o LLI 11 Add a patient Before starting a measurement the patient must be entered into Eaglet Eye Surface Profiler To add a patient take the steps listed below 1 Go to the home screen 2 Click on the plus sign in the Customer column Customer column changes to four input fields for the patient data 5 Enter the required data Given name Family name Birthdate Patient ID 4 Click Apply New measurement A new measurement can be made by pressing the button New measurement This button is disabled if no customer is selected Making a new measurement is done by following the steps listed below 1 Make sure the patient does n
10. to the shipping firm immediately and that the damage be documented on the consignment note so that the claim can be settled properly Our terms of trade and delivery are valid as laid down at the time of purchase Liability for malfunction and damages Eaglet Eye only considers itself responsible for the safety reliability and proper function of the instrument if it is used in compliance with this user manual There are no parts attached to or inside the instrument that should be serviced or repaired by the user If assembly work expansions adjustments maintenance work alterations or repairs are carried out by non authorized personnel or if the unit is handled improperly Eaglet Eye is not liable for any damages that might occur If authorized persons perform the kind of work described above documentation of the nature and extent of the repair work must be demanded of them if pertinent with a statement regarding changes made in specifications or application The document must include date and particulars of services performed as well as name and address of firm and signature If desired Eaglet Eye will put wiring diagrams lists of replacement parts additional descriptions and instructions for installation at the disposal of such authorized persons In case of maintenance and repairs only original Eaglet Eye parts are to be used Compliance EMC The ECC od FEALES Noderlaad B V heme declares thai the eaglet eye com
11. The Eye Surface Profiler ESP is a system using Fourier Transform Profilometry that measures the anterior surface of the cornea the limbus and large parts of the sclera Up to 20mm diameter of the visible anterior surface can be measured The ESP requires fluorescein instilled in the eye so that the projected light is scattered back from the eye front surface The measurement process consists of 5 single shots in rapid succession that last a few milliseconds The ESP calculates a 5 dimensional model of the anterior surface of the eye with on average more than 250 000 measurement points From these measurement points maps and parameters are calculated automatically that assist in the evaluation of the shape of the cornea limbus and sclera Separately the pupil size and iris size are determined automatically from a top view image The ESP measures the complete anterior front surface of the eye up to 20mm without extrapolation The corneal limbus is the border of the cornea and the sclera The average corneal diameter is 11 77 0 5 mm for males and 11 64 0 47 mm for females The new software will detect the limbus automatically and will give you detailed information about the whole cornea The ESP is a Profilometry based system and has therefore no interference with the shadow of the nose eaglet eye com o C gt t D Un ED D gt LLI 4 E o LLI Contents 01 02 03 04 Quick Reference Gu
12. aglet eye com Web contact www eaglet eye com
13. asurement has been made The colour scale of the tangent angles maps can be adjusted and therefore customized to the individual preference of the eye care practitioner Source This picture of the source shows an excellent centration and focus The white dots on the horizontal red line are an indicator for the centration the two white dots on the right part of the iris placed above each other indicate the focus of the camera and therefore the sharpness of the measurement 22 eaglet eye com La Cc La ap Un D gt LLI ES OD Lg LLI 25 The grid map visualizes the vertical Lines as projected on the eye and reflected back into the camera The clear contrast between the lines indicates that there was enough use of fluorescein during this measurement which optimizes the quality To read the quality of the measurement there is a Quality bar on the right which indicates the centration focus and brightness of the measurement Bisphere elevation F mibi ED Lam ia imam th La I Tim E j i i Bl j The bisphere elevation map allows the operator to simulate two best fit spheres on the eye a corneal sphere and a scleral sphere To get the most detailed version of the measurement you need to simulate two spheres due to the difference in steepness of the corneal curvature compared to the scleral curvature eaglet eye com g9 o D Un
14. ch shows no such behaviour which introduces an asymmetry to the eye surface A pronounced asymmetry between the nasal and temporal scleral curves will impact lens fit Tsag Nsag The image above indicates a horizontal cross section of a typical eye surface The sagittal height is calculated over a total chord of 16mm in this example TSsag and Nsag each get attributed exactly half of the total chord length and the respective sagittal heights are determined from the apex outwards 20 Other sagittal height parameters displayed in the ESP software are 560 This is sagittal Sagittal height height calculated E over as many Chora length 19 00 FY meridians as Meridional 5 87mm possible building towards the average j 5 88mm sagittal height over 6 50mm the full 560 degrees 5 46mm of the eye ag Nsag 1 05mm Meridional This is the sagittal height for one single meridian MINsag MAXsag Similar to the 560 degrees sagittal height is that it includes all available meridians at the given chord length Out of the available sagittal heights it will then select the maximum and its angle and also the minimum and its angle eaglet eye com 5 80mm 5 95mm g9 gt i D Un D gt LLI 4 E O o LLI 21 eaglet eye com g9 C Lg 2 i D V D gt LLI O La LLI Figures The following figures will show the different functionalities and results after the me
15. cross section can be minimized in order to get a bigger view of either the cross section or the map Tr E pe GELB ateta bib IBI EI o C La i D Un D gt LLI E O g9 LLI 51 eaglet eye com g9 o rum D Un ED D gt LLI 4 E g9 LLI 5 Exporting Printing and Comparing Results When a patient is selected in the home screen it is possible to print export remove or compare any results simply by clicking the check mark on the right OaM PM 05 AU 0g 12x24 PM 05 HO ag 1x23 PMD5S 52 eaglet eye com gt u D Un ED D gt LLI 4 E LLI 55 The same options are also to be found in the screen after opening a specific measurement Just select one or more measurements in the right bar see right picture below and then choose between the three options below print export or discard The measurements you have selected will appear in the small box in the left of the screen Selected 08 November 2014 oS 10 15 AM OD U BG 3 01PM 05 25 October 2014 v ims 10 October 2014 17 July 2014 The printing option enables the eye care practitioner to print both OD and OS see printing example below eaglet eye com The export option enables the eye care practitioner to export measurements in different formats and extensions
16. ed in a lens design eaglet eye com g9 A C g9 gt i D Un BED D gt LLI E O g9 LLI 5 In the right of the screen you can find the parameters of the measurement in order to help the eye care practitioner to choose the right values for the lens design There are three options to display a lens design for the measurement fit lens and fluorescein simulation ae E x a r zu EI L mp d IT TETTE Troubleshooting When starting New measurement no image appears To connect the ESP hardware a USB 2 0 connection is required Reassure if the USB port to which the hardware is connected complies with the USB 2 0 standard e The camera image freezes Check if the camera image is frozen by moving your hand in front of the ESP camera Take the steps listed below 1 Close ESP software 2 Pull out USB from base of the measurement head 5 Insert USB back into base of the measurement head 4 Start ESP software e Software is unable to process the image 1 Close the error dialog 2 Close the ESP software 5 Start the ESP software o recover the measurements that were lost during the process error follow the next steps 1 Open file browser 2 Go to CAUsersNCOMPUTERNAMENAppDataNRoaming Eaglet Eye Eye Surface Profiler 5 Click measurement zip n error occurred Unable to process image eaglet eye com g9 cC o D Un ED D gt LLI 4 E
17. er and ensure that no moisture can penetrate the instrument For this reason do not place any containers filled with fluids near the instrument When cleaning the instrument with a damp cloth be sure that no moisture enters it This instrument is a high quality technical product containing sophisticated optics In order to assure faultless and safe operation service inspections must be performed according to the service plan of Eaglet Eye See also the chapter on Maintenance and Service in this manual Eaglet Eye emphasizes that the user bears the full responsibility for the correctness of data measured calculated or displayed using the ESP The manufacturer will not accept claims based on erroneous data 06 eaglet eye com gt cC o E MS D Un ED D gt LLI O LLI 07 Setting up and installation of equipment Before initial operation the ESP needs to be set up and connected by an authorized dealer or service department Before installing the ESP please consider the transport storage and current room temperature where the device is to be installed Make sure the device is at room temperature The ESP must be placed at a place prevented from direct day light from influencing the components A reflection free examination must be assured Therefore the ESP should be used in a darkened room When placing the measurement head on the base plate make sure the wheels are exactly aligned in
18. he supplier Before maintenance and cleaning the instrument always pull out the power plug of the ESP and all equipment attached to it for example a printer Do not connect cables if this proves difficult If it is impossible to make a connection check to see whether the plug fits into the socket In case you ascertain a defect contact your authorized dealer to have it repaired by our service team When disconnecting electrical connections always pull on the plugs not on the cables Supplementary equipment which is connected to the analog or digital interfaces of the instrument eaglet eye com o gt t D Un ED D gt LLI 4 E o LLI must comply with relevant specifications For detailed instruction on maintenance and cleaning turn to the chapter on Maintenance and Service in this manual If the ESP is coupled with external electrical equipment for ex a printer this must not result in a decrease of patient safety If the coupling of equipment causes the tolerance levels for leakage current to be exceeded safety features which include a disconnection device must be provided for Do not operate the delivered equipment e in areas with risk of explosion in the presence of flammable anesthetics or volatile solvents such as alcohol benzene or similar substances Do not use or store the instrument in damp rooms Avoid placing the instrument in the vicinity of dripping running or spraying wat
19. ide Components Important elements View window Connections Safety Setting up and installation of equipment Technical details of the ESP Operational instructions Home screen overview Database Location Add a patient New measurement Finding an existing patient Search results History Viewing results Parameters Sagittal height Figures Source Grid Bisphere elevation Bisphere 5D Tangent angles map Tangent angles 5D map Height 05 04 04 04 04 05 07 08 09 09 09 11 11 15 15 15 16 16 20 22 22 23 23 24 24 25 25 eaglet eye com C o MS D Un ED D gt LLI O LLI 05 06 07 08 Us Height 5D Fluorescein simulation map Tangential curvature Axial curvature Refractive power Corneal elevation Quad map Notes Evaluating functionalities Exporting Printing and Comparing Results Lens Design Module Troubleshooting Maintenance and service Care and maintenance Casing Optical components Software installation Minimum PC requirements Conditions of warranty Liability for malfunction and damages Compliance EMC CE Index Address of manufacturer and service department 26 26 27 28 29 29 50 50 51 52 56 58 59 59 59 59 59 40 40 41 42 42 42 45 45 k Reference Quic Guide uo aKa 19 bea ion H rt LE um E w ut aa o LL enuey Jesn 344 791527 05 Components Important elements 1 Forehead suppo
20. nd AA footnote 1 The mathematical formula for the Simulated KPI using simulated component indices Is described below KPI 4 62 0 50 0 01 41 25 0 15 DSI 1 18 OSI 1 49 CSI 4 13 SAI 0 56 SimKs 1 08 SimKf 3 74 IAI 0 10 AA 60 25 Keratoconus indices are designed to be an adjunct to a clinical examination and should never be used as a sole assessment tool in the diagnosis of keratoconus footnote 2 Indicates the start of the limbus area measured from the apex the second value corresponds to the width of the limbus Horizontal Visual Iris Diameter Pupil diameter Distance in x and y from the apex to the pupil centre The palpebral aperture relative to the pupil these values are the length of the eye above and below the pupil The palpebral aperture relative to the corneal centre apex these values are the length of the eye above and below the apex 1 See Index Page 43 2 Maeda N Klyce SD Smolek MK Thompson HW Automated keratoconus screening with corneal topography analysis Invest Ophthalmol Vis Sci 1994 55 2749 57 eaglet eye com g9 2 D Un m D gt LLI w O LLI Sagittal height Tsag Nsag is the new parameter added to the ESP software that will quantify scleral asymmetry and give eye care professionals better control over lens fits Literature describes the flattening of the sclera on the nasal side of the eye compared to the temporal side whi
21. nd then clicking Programs and Features Now select a program and then click Uninstall Minimum PC requirements ESP software will only run on Windows 7 or higher The computer system should have at least 4 GB of RAM Also the computer must have at least one available USB 2 0 port Conditions of warranty This Eaglet Eye product is a high quality instrument It was manufactured with great care using high quality materials and modern production technology It is important that you read the user manual before operation and observe the safety precautions You have a warranty on this instrument in accordance with legal warranty regulations starting on the day of purchase This warranty covers all kinds of malfunction caused by faulty material and manufacture Malfunction caused by improper operation and external influences is not covered Should you nevertheless have reason for legitimate complaint during the period of warranty the malfunction will be eliminated at no cost to you These warranty claims can be made if a receipt documenting date of purchase is presented If unauthorized persons manipulate the instrument all warranty claims become void for improper alterations and handling can cause considerable damage to the user and patients 40 eaglet eye com g9 C o D Un ED D gt LLI 4 E g9 LLI 41 We request that complaints concerning damages which occur during transport or delivery be made
22. ot wear contact lenses 2 Select the patient from the customers if the patient is not available enter the patient following the add a patient procedure The name of the patient appears in the customer column title The button New measurement is enabled 5 Apply fluorescein The patients eye reflects light used by the ESP Make sure that a large part of the sclera is yellow in order to get the best results 4 Tell patient to place head on chin rest 5 Adjust chin rest with swivel so that the patient s eye is roughly at Level of marker 6 Select new measurement in the ESP software A live image of the patients eye is shown in the ESP Software eaglet eye com Focus device and ask patient to look at the red cross JM Out of focus too far away eS Ow HM Too far to the left The focus lights help you to focus by aligning and positioning the lights on the eye as is shown on the right o cC gt u D Un ED D gt LLI 4 E C g9 LLI 8 Hit fire button The patient sees two flashes and the ESP software shows the images If the images are unsuitable because of the patient blinking click discard 9 Select measurements by clicking a check mark in the box next to the images and click save 12 eaglet eye com o E o i D Un D D gt LLI ED O g9 LLI 15 The ESP software starts processing the images Instead of clicking the save button afte
23. power Pi j eaglet eye com g9 cC o D Un ED D gt LLI 4 E g9 LLI Inferior Superior IS Inferior Superior index is simulated as the difference between the inferior and superior average dioptric values approximately 5 mm peripheral to the corneal vertex as defined by the center of the map Opposite Sector Index OSI The simulated opposite sector index reports the greatest difference in average area corrected power between opposite 45 sectors Surface Asymmetry Index SAI The surface asymmetry index is simulated as the centrally weighted average of the summation of differences in corneal power between corresponding points 180 apart on all meridians Standard Deviation Powers SDP SDP is simulated as the standard deviation of all measured powers present on the map Surface Regularity Index SRI The surface regularity index is simulated as a difference in power gradient between successive points on a hemi meridian that is assigned a positive value and added to the running sum This sum is divided by the number of points that went into the sum and then scaled The mathematical formula of the simulated SRI index is 44 eaglet eye com Address of manufacturer and service department You can receive additional information from our service department and authorized dealers Eaglet Eye User Manual Eaglet Eye B V Jules Breukersstraat 21 6041 BP Roermond The Netherlands E Mail support e
24. r a measurement the operator can choose the save and add more button to expand a measurement session The picture below displays a measurement session of both eyes If the operator would click the save button the one in the right all of these nine measurements will be saved In order to provide the highest quality of the measured results there are some tools that will help the operator to optimize the focus centration and sharpness of the camera before making a measurement In the left bar in the picture above the operator can choose the eye tracking option The colour bar on the right gives live indication of the quality of focus brightness and sharpness while the operator adjusts the position of the measurement head The two dots on the right of the eye still have to be placed above each other The green circle with green plus has to be placed between the white focus points Please instruct the patient to look straight ahead at the red cross In order to get an optimal centration The measurements are saved in the ESP software All three measurements are selected and they can be unselected by clicking the check mark Below these three measurements you can see an indication of the quality of the measurements 10076 meaning enough light fluorescein and excellent focusing by the operator Overall 50 Focus 50 Centration 100 Brightness 9536 eaglet eye com o zm 2 D Un
25. rror of the astigmatic eye stems from a difference in degree of curvature refraction of the two different meridians SimK SimK Anterior Curvature are calculated with parameters the so called keratometric index which is known from Placido topographers and is equal to 1 3375 This does not correspond to the actual index of refraction of the cornea 1 5 6 since it takes into account the posterior surface parameters calculated with keratometric index are called simulated SimKf SimKs Steep SimKs and SimK flat SimKf are calculated from the pair of meridians 90 apart with the greatest difference in average power from 0 5 to 2 0 mm distance from the centre O T gt D nr Z O CO D m This maximizes the Astigmatism parameter which E is the difference between SimKf and SimKs Astigmatism As mentioned above the astigmatism value is the D difference between SimKs and SimKf i Corneal un Asphericity D Ks K values are calculated with actual refractive bi index of the cornea 1 5 6 Ks stands for steep curve Kf AK values are calculated with actual refractive index of the cornea 1 576 Kf stands for flat curve Os steep Of flat Qavg average e is the symbol for eccentricity Q is the symbol for asphericity p is the symbol for shape factor 17 The three are related through the following formula OQ 2p 1 e2 Table conic sections e p Q Smee 39 1 oo awe e no 8 3 O
26. rt 2 Optimal eye height indicator b O 5 Chin rest gt 4 Chin rest height adjustment t swivel T 5 Joystick 6 Fire button View window View window 8 Digital camera 9 Focus help LEDs 12 15 14 10 Fixation cross 11 Measure pattern projectors Connections 12 USB Port 15 DC power inlet 14 Power adapter La gt c La D N D gt LLI ES O La LLI 04 eaglet eye com g9 gt D Un ED ap gt LLI O O o LLI 05 5 Safety To assure safe operation it is imperative that the instrument is used according to the instructions in this manual Therefore you should become thoroughly familiar with the content of the user manual before putting the system into operation The Eye Surface Profiler ESP system must only be operated by trained personnel capable of using it properly on the basis of their training expertise and practical experience Please save this user manual and ensure that it is accessible to operating personnel at all times This instrument must only be used for purposes as laid down in this user manual Before using this instrument for the first time you must be instructed on how to use it by our staff or an authorized dealer Only operate the instrument with the original components supplied by Eaglet Eye and if the instrument is in good working condition Should the instrument be defective do not operate it and contact t
27. s on the eye It takes as input the front surface of the cornea and the back surface of a contact lens and the specified relative positioning of the lens on the cornea The simulation allows the eye care practitioner to assess the fit of the contact lens on the eye The simulated lens is spherical in shape 26 eaglet eye com 2 o 2 v D Un ED D gt LLI 4 V C LLI 2 Tangential curvature et i d EET EC EH XA ii lia EU a ine ang es i THA niil ur L i vm 1m im i im a i ua LE im mp im bin i rm T ia i im a ic ica im rm LL im Ha mu a mee um The tangential map is sometimes referred to as the instantaneous local or true map Using colours to represent changes in dioptric values it displays the cornea as a topographical illustration The tangential calculations are based on a different mathematical approach therefore this map can more accurately determine and display the peripheral corneal configuration There are no assumptions made as to the spherical shape of the cornea Compared to axial maps tangential maps yield smaller patterns with details that are more centrally Located Tangential maps also offer a better visualization of the precise location of corneal defects This map is especially useful in following trends in the postsurgical or pathologic eye Disadvantage of the tangential maps is that the
28. the rail This can be easily checked when holding a card at the base plate and at the end of the rail the wheels should touch the card at both sides If this is not the case adjust the wheels in the rail This is an optical device and should be handled with care Do not subject it to vibrations jolts or high temperatures Important elements Model ESP 20200 Seizes Depth Width Height 55 cm 55 cm 48 cm Weight 12 kg Energy and power PLUG POWER SUPPLY 10W EU 7 5V e Power Supply Output Type Fixed Input Voltage AC Min 90V nput Voltage AC Max 264V Output Voltage Nom 7 5V e Output Current Max 1 14A e Output Power Max 8W Output Connector Barrel Plug e SVHC No SVHC 16 Jun 2014 e Applications General Purpose e No of Outputs 1 e Output Current 1 14A e Output Voltage 7 5V e Power Rating 8W Power consumption SW eaglet eye com c o v D Un E D gt LLI 4 E Oo LLI eaglet eye com EN o D Un Em D gt LLI 4 E o LLI 09 Operational Instructions Home screen overview Database location When installing the Eye Surface Profiler software the database for new measurements will automatically be saved on C Users COMPUTERNAME AppData Roaming Eaglet Eye Eye Surface Profiler This can be changed to a location of preference by clicking settings database move database See picture below The location
29. y tend to be noisy eaglet eye com o Em gt D Y ED D gt LLI 4 O o LLI Axial curvature ET A eu EFI L ret gun 22321 LE fT Cl ema mem Eum inda Bi The axial curvature map also called sagittal or power map is the most straight forward of all the topographical maps It shows variations in corneal curvature as projections and uses colours to represent dioptric values Warm colours such as orange and red show steeper areas cool colours such as blue and green denote the flatter areas To get a global view of the corneal curvature as a whole the axial curvature map is the best choice The downside to the axial curvature map is its tendency to ignore minor variations in curvature 28 eaglet eye com gt D Un ED D gt LLI 4 E LLI 29 Refractive power quu j1 i d qi r PEEL i AH Od DOE rat titi The refractive power map utilizes the measured dioptric power and applies Snell s law to describe the corneass actual refractive power The aspheric countour of the cornea and spherical abberations can be compensated by a refractive map The most important part of the refractive map is the centre Abberations on the pupil almost invariably impact the visual performance Corneal elevation i E 3 i i E fitt i eee LiT zu TIT i f initi
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