Abstract
Purpose :
To quantify the amount of straylight in glaucomatous phakic and pseudophakic eyes, and to assess the impact of stimulus location on straylight outcome.
Methods :
Straylight was measured in 53 age similar subjects (15 healthy phakic, 15 glaucoma phakic, 9 healthy pseudophakic and 14 glaucoma pseudophakic) using two versions of the C-Quant Straylight meter (Oculus, Wetzlar, Germany); the commercially available C-Quant with the glare stimulus at an effective angle of 7°, and a modified version with the glare stimulus at an effective angle of 2.5°. A generalized linear model was performed to investigate the impact of glaucoma, intraocular lens state and the angle of glare stimulus on straylight measurement.
Results :
Straylight measured in eyes with glaucoma was found to be higher than what was measured in healthy groups (P<0.001), with the presence of pseudophakia further elevating straylight levels (P<0.001). For all subject groups, more straylight was reported by the adapted version of the C-Quant than the commercial C-Quant (P<0.001).
Conclusions :
Subjects with glaucoma and pseudophakia report more straylight than their non-glaucomatous and phakic peers, respectively. The angle at which straylight is measured influences the test result, limiting interchangeability of devices.
This is a 2020 ARVO Annual Meeting abstract.