Effect of straylight on contrast sensitivity in simulated cataracts under glare conditions

Session Details

Session Title: Cataract I
Session Date/Time: Friday 26/02/2016 | 10:30-12:30
Paper Time: 10:54
Venue: MC3 Room
First Author: : H.Ginis SPAIN
Co Author(s): :    A. Pennos   P. Artal           

Abstract Details

Purpose:

To investigate the role of light scattering (straylight) as measured by two different methods on contrast sensitivity investigated under glare and non-glare conditions.

Setting:

Laboratorio de Optica Universidad de Murcia, Murcia, Spain.

Methods:

Intraocular straylight was measured in the dominant eye of 10 emmetropic subjects without any known ocular pathology (30±5 years). Cataract was simulated optically by introducing diffusing filters (Black Pro-Mist Tiffen) in front of the measured eye. Straylight was assessed by means of a new optical device (Sigma) as well as psychophysically (Oculus, C-Quant). Contrast sensitivity function (CSF) was measured for each subject with and without the presence of a glare source. For each eye, the straylight parameter (Log(S)) was determined and was associated to the loss of contrast sensitivity under glare conditions.

Results:

The loss of contrast sensitivity under glare conditions was positively correlated to the Straylight parameter (S) under both measurement methods (Pearson’s R=0.67)

Conclusions:

Straylight measurements using objective methods can facilitate the understanding of glare phenomena and the associated loss of retinal image contrast. The mathematical framework for the link between the two is discussed.

Financial Disclosure:

NONE