[Perimetric glare test and evaluation of intraocular lenses]

Twelve normal control phakic eyes together with a number of other pseudophakic groups each consisting of 6 eyes were enrolled in this study of spatial and quantitative measurement of glare disabilities in the static visual field (Perimetric Glare Test) using an OCTOPUS 500E automated perimeter with an attached glare source. These groups were a 6 mm no hole lens group, a 6 mm 4 hole lens group, a 5.5 x 6.5 mm 2 hole lens group, a 5.0 x 6.0 mm no hole lens group and a diffractive multifocal group. Glare disabilities in the visual field were minimum in the control group. The 6 mm no hole lens group and the diffractive multifocal group showed no statistical significance compared the control group. Groups with the two types of ovoid lens and the 6 mm 4 hole lens group showed a statistically higher degree and a greater extent of glare disabilities in the static visual field than the control group. Careful selection of appropriate patients to receive implants of small efficient optic IOLs, such as IOLs with positioning holes and ovoid lenses, according to the preoperative pupil size under scotopic or mesopic condition and efficient lens optic size are important in order to reduce hole and edge glare. The diffractive multifocal IOLs group showed a slightly higher degree and a greater extent of glare than the control group and the 6 mm no hole monofocal lens group but the difference was very small and statistically insignificant. Therefore the effects of diffractive microstructure on glare disabilities were considered to be slight and clinically acceptable.