Intraocular lens (IOL) is an artificial implant substituting natural crystalline lens which is non-transparent due to cataract. Incorrect location of the IOL in the eyeball (e.g. its shift or tilt) causes significant deterioration of patient’s vision. The analysis of Purkinje images (i.e. reflections from successive refracting surfaces in the eye) enables to determine the real IOL location and thus helps in evaluating the retinal image quality. The experimental setup for Purkinje images recording consists of illuminator, composed of a number of infrared LEDs, telecentric lens and detector (CCD camera). Analysis of mutual position of particular reflections enables to evaluate the lens location in respect to the corneal axis. The actual measurements are realized on artificial eye model, what allows to estimate the precision of the algorithm applied in the calculations. In the future the experimental set-up will be adapted to measure the eyes of real patients.
An optomechanical model of human eye containing artificial cornea and a cuvette with immersion liquid is developed.
An artificial implantable intraoculer lens (IOL) inserted into the cuvette stands for the eye crystalline lens. A special
mechanical handle holding the IOL enables to move and rotate it thus simulationg possible errors during lens
implantation procedure. The "retinal" image is recorded with the high resolution CCD camera. The image of Siemens
star serves as qualitative measure of "retinal" image, while more quantitatively data come from Modulation Transfer
Function obtained by the analysis of the images of sinusoidal tests generated on the computer screen. The whole eye
model can be used for investigation of the impact of type and location of the IOL on the optical performance.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.