Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance

Abstract

Citation: Werner L, Stover JC, Schwiegerling J, Das KK. Effects of intraocular lens opacification on light scatter, stray light, and overall optical quality/ performance. Invest Ophthalmol Vis Sci.

Assessment of straylight and the modulation transfer function of intraocular lenses with centrally localized opacification associated with the intraocular injection of gas

“…7 In two other studies, on a distinct opacification pattern, a steep decline of MTF values was demonstrated. 20,30 In the current study, not all analyzed lenses demonstrated significant MTF effects. The SR of two IOLs (case 1 and 4) was lower than that of the control lens only by 4% at the 3-mm pupil.…”

“…Two studies reported light scattering from lens explants, however, the etiology of the calcification process of those lenses differ from that of the IOLs included in the current study. 20,28 Werner at al. 20 studied extended to the haptics in some cases: one silicone lens with dense central opacification that was explanted from a patient with asteroid hyalosis, and four PMMA lenses had snow-flake degeneration.…”

“…[24][25][26][27] Studies on straylight from different types of IOL opacification such as calcification, snow-flake degeneration, and glistenings, have shown that straylight is a very sensitive measure to detect the presence of IOL pathology. 20,28,29 Deterioration of the optical quality in those lenses in terms of the MTF, occurs only if opacification is severe. 20,30 MTF levels of a calcified IOL after the DMEK/DS(A)EK procedure were presented in two studies, however, straylight was not included in those reports.…”

“…20,28,29 Deterioration of the optical quality in those lenses in terms of the MTF, occurs only if opacification is severe. 20,30 MTF levels of a calcified IOL after the DMEK/DS(A)EK procedure were presented in two studies, however, straylight was not included in those reports. 12,22 The aim of this laboratory study was to assess the effect of centrally localized IOL calcification, associated with the intraocular injection of gas, on the lens optical quality by measuring the MTF and straylight measurements.…”

Validation of a spectral light scattering method to differentiate large from small particles in intraocular lenses

“…Straylight from larger particles (e.g. glistenings, surface deposits) has been studied [3][4][5][6]. Submicron particles have also been found in IOLs (i.e.…”