Difference in chromatic aberration of intraocular lenses
Session Details
Session Title: Pseudophakic IOLs: Enlarged-Depth-of-Focus I
Session Date/Time: Monday 12/09/2016 | 14:00-15:30
Paper Time: 15:10
Venue: Hall C4
First Author: : H.Weeber THE NETHERLANDS
Co Author(s): : D. Chang M. van der Mooren J. Graver M. Lowery P. Piers
Abstract Details
Purpose:
To measure the amount of chromatic aberration of different intraocular lens designs.
Setting:
AMO Groningen BV, Netherlands
Methods:
Chromatic aberration was measured in vitro for nine different lens designs. Refractive error was measured in a model eye for five different wavelengths (450, 500, 550, 600, and 650nm). The best focus position was based on maximizing imaging quality (MTF at 50c/mm). Each measurement was performed for two lenses of the same design. Chromatic aberration was expressed refractive error in diopters in the spectacle plane. Results were fitted with a hyperbolic curve (refraction as a function of wavelength; Thibos et. al, 1992).
Results:
Over the measured range of wavelength the average chromatic aberration of the different lens designs was 1.47 diopter. The difference between the lens design having the largest amount of chromatic aberration and the lens design having the lowest amount of chromatic aberration was 1.03 diopters. The lens with the lowest amount of measured chromatic aberration shows smaller chromatic aberration than the aphakic eye. This means that the lens corrects corneal chromatic aberration.
Conclusions:
Chromatic aberration of IOLs can be measured in a physiologically representative chromatic eye model. Ocular chromatic aberration, measured in the range between 450nm and 650nm, varies by as much as 1 diopter between different IOL designs.
Financial Disclosure:
... is employed by a for-profit company with an interest in the subject of the presentation, ... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented
