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Optical measurement of straylight in cataract patients

Poster Details

First Author: H.Ginis SPAIN

Co Author(s):    O. Sahin   P. Artal           

Abstract Details


To evaluate a novel instrument for the measurement of straylight in cataract patients. The instrument is based on the optical integration method and has been adapted for measurements in a clinical setting.


University Hospital of Heraklion and Laboratorio de Optica, University of Murcia.


Cataract patients we randomly selected at the University hospital in Heraklion. Measurements were performed in 64 eyes of 39 cataract patients. For each eye three consecutive measurements were made. An ophthalmic surgeon graded the cataract density according to the LOCS III system. Straylight was additionally assessed psychophysically for all patients using the compensation comparison method (c-Quant, Oculus, Germany)


In the optical measurement, the logarithm of the straylight parameter ranged from 0.64 to 2.36 (Mean: 1.39) in cataract patients and 0.51 to 1.12 (Mean: 0.70) in healthy eyes. In the psychophysical measurement the logarithm of the straylight parameter ranged from 1.00 to 2.25 (Mean: 1.52) in cataract patients and 0.63 to 1.40 (Mean: 0.88) in healthy eyes. The Pearson correlation coefficient for significance level 0.01 “2-tailed” for the two sets of measurement is r=0.844


This new instrument may be a step towards the comprehensive evaluation of the optics of the human eye beyond refraction and high-order aberrations.

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