Evaluation of glare in normal and pseudophakic subjects.
It has been difficult to document the subjective complaint of glare. Devices to quantify this problem include the Miller-Nadler glare tester (MNGT) and the brightness acuity tester (BAT). We used these devices to evaluate a group of pseudophakic subjects (15 eyes with posterior-chamber intraocular lenses) and a group of normal subjects (32 low myopic eyes). A subject's ability to discern contrast with a background glare source is measured as a percentage with the MNGT. The number of lines lost on the Snellen chart as a light is brightened progressively over the line of vision is the BAT score. A Wilcoxon signed-ranks test showed no significant change without correction (SC) to with correction (CC) with the BAT but was significant at P less than .001 with the MNGT. The BAT scores for the normal group CC (mean, 0.59) compared with the intraocular lens group CC (mean, 3.0) with the Mann-Whitney U test showed a statistically significant difference (P less than .001). There also was a difference with the MNGT between normal group CC (mean, 5.1%) and pseudophakic group CC (mean, 8.9%) at P less than .001). These results suggest that pseudophakic subjects have marked visual dysfunction secondary to glare. The BAT, however, showed a more easily quantifiable change unaffected by spectacle correction.
Prasad
A
A
Department of Ophthalmology, Mount Sinai School of Medicine, New York, NY 10029.
Asbell
P A
PA
Senie
R T
RT
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003261:Contact Lenses; D015350:Contrast Sensitivity; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular; D008027:Light / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D012542:Scattering, Radiation; D014786:Vision Disorders / Q000209:etiology / Q000503:physiopathology*; D014792:Visual Acuity