The influence of shine duration on glare in pseudophakic persons

Abstract

Glare can be defined as unpleasant sensation caused by a relatively strong source of light, which results in unpleasantness, discomfort and the lowering of optimal vision characteristics. It has been demonstrated that different factors influence the glare in pseudophakic subjects: opacity in vision media, the brightness of the pupil and the design of intraocular lenses. The aim was to examine the influence of shine duration on glare in pseudophakic persons. We studied 152 eyes of 98 pseudophakic persons, aged from 50 to 70 years, with good vision acuity (0.8 and more) after final correction for far and near vision. The examination was conducted on the device Niktomat (Rodenstock Instrumente GMBH, Munchen-Hamburg) under the conditions of short and long shine. The source of light of 0.35 lux intensity, under the angle of 3 degrees, lightened the pupil for ten seconds in the first test, and continually in the second test. In the observed group, during a direct short ten-second shine, the sign on the screen with the contrast of 30% was seen by 140 eyes (92.1%), and in the control group the sign was seen by 88 eyes (97.8%). Under the direct continuous shine, normal findings were confirmed in 40 eyes (26.3%) of the observed group, and in 83 eyes (92.2%) of the control group. In the observed pseudophakic persons, the duration of shine was found to be in correlation with glare.