Glare following posterior chamber intraocular lens implantation

Abstract

We performed glare tests on patients following uncomplicated extracapsular cataract extraction and posterior chamber intraocular lens implantation and on noncataractous phakic patients. Three types of lenses were implanted to compare the effect of optic asphericity and ultraviolet filtration on glare. Glare testing was performed using the Miller-Nadler Glare Tester and Baylor Visual Function Tester. The glare scores of the pseudophakic and phakic patients were statistically similar. In the pseudophakic patients, factors associated with decreased glare performance were posterior capsular opacification and increased pupil size; the intraocular lens type did not significantly affect glare scores.

Intra-ocular light scatter in pseudophakia

“…The results of our study are not in agreement with the findings of Koch et al [3]. Using the IOI stray light meter we have shown, that the intraocular light scatter in pseudophakic eyes with clinically little or no aftercataract is twice as great as that in normal phakic eyes.…”

“…Koch et al [3], using this method on pseudophakic patients with a comparatively clear posterior capsule, could find no statistically significant difference in glare score when compared with a comparable phakic patient. Higher values were only found when there was slight central opacity of the posterior capsule.…”

“…Nadler et al [5], Knighton et al [2] and Koch et al [3] have already studied the degree of intra-ocular light scatter in pseudophakic eyes. These studies were performed on the Miller-Nadler glare tester in which, using a Landolt-C ring, the loss of contrast sensitivity under glare conditions is determined [4].…”

“…In the latter group, both raised and more or less normal values have been found associated with varying degrees of after-cataract [3,5].…”

Effect of a modified optic edge design on visual function

“…12 Previous studies report similar results in patients with sensitivity between patients with IOLs of different materials and designs. [28][29][30] However, 3 studies found better multifocal IOLs but not in patients with monofocal IOLs. 9,10 However, it is apparent that glare disability is contrast sensitivity with an IOL with a modified prolate anterior surface [31][32][33] and another study found inferior more pronounced under mesopic conditions than under photopic conditions in all pseudophakic patients.…”