Abstract
Purpose::
To determine intraocular scatter measured subjectively in patients with monofocal and multifocal intraocular lens implants (IOLs).
Methods::
Residual mean square error (MSE), contrast sensitivity (CS:9% Bailey-Lovie), subjective retinal straylight (RSL:C-Quant) were measured in 64 eyes of 40 pseudophakic patients: Group 1 (mean age 71.81±9.20y) treated with monofocal IOLs (n=15 ThinOptix, ThinOptx Inc, n=17 AcriSmart 48S, AcriTec); Group 2 (mean age 65.52±11.97y) treated with multifocal IOLs (n=10 Acrysof ReSTOR, Alcon; n=22 ReZoom, AMO). All investigations were conducted with a natural pupil and between 6 months and 1 year after implantation. ANOVA was used to establish differences between groups; Pearsons product moment analysis assessed the relationship of RSL to all parameters.
Results::
The two groups were similar for residual mean square error, pupil size, age, CS and RSL. RSL values exhibited a significant trend with CS (r=0.327; p=0.008), age (r=0.339, p=0.010) and pupil size (r=-0.282, p=0.024) for all the patients, regardless of the lens type. Within groups, straylight values were associated with pupil size for the monofocal group (r=-0.377, p=0.033) and contrast sensitivity in the multifocal group (r=0.397, p=0.024). There were no within-group differences by lens type for either RSL or CS.
Conclusions::
For the four lens types used, there were no differences in CS or subjective perceptions of scatter as measured using the C-Quant. However, perceived light scatter increases with age, diminishing pupil size and is associated with poorer contrast function.
Keywords: intraocular lens • optical properties • presbyopia