Visual quality after diffractive intraocular lens implantation in eyes with previous hyperopic laser in situ keratomileusis

Visual quality after diffractive intraocular lens implantation in eyes with previous hyperopic laser in situ keratomileusis

01/06/2011
Evaluate distance visual quality in eyes with diffractive intraocular lens implantation after previous hyperopic laser in situ keratomileusis
AUTHORS.
Alfonso JF, Fernández-Vega L, Baamonde B, Madrid-Costa D, Montés-Micó R.

METHODS.
Corrected distance visual acuity (CDVA) at 12.5%, 25.0%, and 100% contrast levels under photopic and mesopic conditions; uncorrected (UNVA) and distance-corrected (DCNVA) near visual acuity, defocus curves, and corneal higher-order aberrations (HOAs) were measured in eyes that had AcrySof Restor SN60D3 spherical IOL implantation (study group) and in phakic eyes (control group) after hyperopic LASIK.

RESULTS.
Under photopic conditions at 100% contrast, there were no statistically significant differences between the 2 groups (P > .01) and the CDVA was 0.1 logMAR or better (approximately 20/25) in both groups. At 25.0% and 12.5% contrast, there were no statistically significant differences between the 2 groups (P > .01). Under mesopic conditions, the control group had better CDVA than the study group without glare at all contrasts (P < .01). In the study group, the mean UNVA was 0.017 logMAR ± 0.030 (SD) (approximately 20/20) and the mean DCNVA, 0.009 ± 0.030 logMAR. There was statistically significant worsening of visual acuity as a function of the distance to the test (P < .01). There were no statistically significant differences in HOAs between the 2 groups (P > .01).

CONCLUSIONS.
In eyes with previous hyperopic LASIK, the diffractive IOL provided good visual quality at distance, comparable to that obtained in phakic eyes under photopic conditions, although visual performance was slightly poorer under mesopic conditions.

FINANCIAL DISCLOSURE.
No author has a financial or proprietary interest in any material or method mentioned.

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