Experimental characterization of the imaging properties of multifocal intraocular lenses

Pier Giorgio Gobbi; Francesco Fasce; Stefano Bozza; Rosario Brancato

doi:10.1117/12.482467

14 July 2003 Experimental characterization of the imaging properties of multifocal intraocular lenses

Pier Giorgio Gobbi, Francesco Fasce, Stefano Bozza, Rosario Brancato

Proceedings Volume 4951, Ophthalmic Technologies XIII; (2003) https://doi.org/10.1117/12.482467
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

Many different types of intraocular lenses (IOL) are currently available for implantation, both as crystalline lens replacements and as phakic refractive elements. Their optical design is increasingly sophisticated, including aspherical surface profiles and multi-zone multifocal structures, however a quantitative and comparative characterization of their imaging properties is lacking. Also a qualitative visualization of their properties would be very useful for patients in the lens choice process. To this end an experimental eye model has been developed to allow for simulated in-vivo testing of IOLs. The model cornea is made of PMMA with a dioptric power of 43 D, and it has an aspherical profile designed to minimize spherical aberration across the visible spectrum. The eye model has a variable iris and a mechanical support to accomodate IOLs, immersed in physiological solution. The eye length is variable and the retina is replaced by a glass plate. The image formed on this "retina" is optically conjugated to a CCD camera, with a suitable magnification in order to mimic the human fovea resolution, and displayed onto a monitor. With such an opto-mechanical eye model, two types of images have been used to characterize IOLs: letter charts and variable contrast gratings, in order to directly simulate human visual acuity and contrast sensitivity.

Citation Download Citation

Pier Giorgio Gobbi, Francesco Fasce, Stefano Bozza, and Rosario Brancato "Experimental characterization of the imaging properties of multifocal intraocular lenses", Proc. SPIE 4951, Ophthalmic Technologies XIII, (14 July 2003); https://doi.org/10.1117/12.482467

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

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.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available