Glare disability and spherical aberration with five foldable intraocular lenses: a prospective randomized study

Abstract

ABSTRACT.Purpose: To compare differences in subjective glare and spherical aberration between five foldable intraocular lenses (IOLs) made of different materials and to different designs. Methods: This prospective study comprised 175 cataract patients who underwent phacoemulsification and were randomized to receive one of five types of foldable IOL (AcrySof 1 MA30BA, Alcon; Sensar 1 AR40, AMO; AcrySof 1 SA30AL, Alcon; Sensar 1 AR40e, AMO, and Tecnis 1 Z9000, Pharmacia & Upjohn). All patients received a questionnaire investigating the incidence of subjective photic phenomena. Two months postoperatively, we collected data regarding subjective glare and evaluated pupil size, visual acuity and wavefront aberration of the cornea and eye. Results: With regard to difficulty in performing ordinary activities under different light conditions and light and dark adaptation, the difference between the groups was not significant (p > 0.05, chi-squared test). With respect to difficulty in driving at night, the MA30BA group had a significant higher incidence of photic phenomena than the SA30AL, AR40e and Z9000 groups (p < 0.05, chisquared test). Wavefront measurements revealed a significant difference between the Z9000, AR40e and SA30AL groups, which showed the lowest values, and the MA30BA group, which showed the highest value (p < 0.05, ANOVA with Tamhane posthoc test). Conclusions: New generation IOLs such as the Pharmacia Z9000, AMO AR40e and AcrySof 1 SA30AL have a lower incidence of glare and spherical aberrations; however, their impact on future IOL design should be conditioned by further data, especially regarding posterior capsule opacification.

Quality of vision after cataract surgery after Tecnis Z9000 intraocular lens implantation

“…Objective measurement of optical quality with wavefront sensors has shown a significant reduction in spherical aberrations in patients with the Tecnis IOL compared with patients with conventional IOLs. 26,31,32 Our study strengthens these findings and, in particular, corroborates the results of Bellucci et al's 32 initial investigation. In their preliminary study, spherical aberration was significantly reduced with the Tecnis IOL, with values close to zero, while coma and trefoil aberration values were not significantly different between the IOLs studied.…”

Comparative study of aspheric intraocular lenses with negative spherical aberration or no aberration

“…The contrast sensitivity data presented here, which used a device with grids of variable intensity and variable steps, was not skewed by the ceiling effect that can occur with other devices. 31 Many studies 23,29,30,32,33 found a statistically significant decrease in spherical aberration with the Tecnis Z9000 IOL compared with some spherical IOLs. In our study, both IOL groups had mean average spherical aberration that was less than that previously reported in patients with a traditional spherical biconvex IOL.…”

Spherical aberration and coma with an aspherical and a spherical intraocular lens in normal age-matched eyes

“…[18][19][20] The main reasons for these limitations are the clinician's lack of familiarity with the matter, lack of standardization of ocular aberrometers, disagreement on how to report the measurements, and uncertainty about which aberrations are most important for vision. Although recent studies seem to bridge the gap between physical optics and clinical ophthalmology, [19][20][21][22] some disagreement still exists in published papers.…”