[Functional results with two multifocal intraocular lenses with different near addition].

BACKGROUND

The reduction of the near addition of multifocal intraocular lenses from +4 D to +3 D should improve the visual function in the intermediate distance. The ReSTOR +3 D is a multifocal lens with a near addition of 3 D.

PATIENTS AND METHODS

In a prospective study the new ReSTOR +3 D was compared to the former ReSTOR platform with 4 D near addition. A total of 40 patients received 1 of these 2 multifocal lenses bilaterally in both eyes after uneventful phacoemulsification in otherwise sound cataract eyes (20 patients ReSTOR +3 D, 20 patients ReSTOR + 4D). After 3 months the following parameters were assessed: uncorrected and corrected distance visual acuity, near vision at different distances, contrast sensitivity, defocus curve and anterior and posterior segments. The functional tests were performed monocularly and binocularly.

RESULTS

Uncorrected binocular distance visual acuity (decimal) was 0.93 (logMAR 0.03 ± 0.12) in the ReSTOR +3 D group and 1.05 (-0.02 ± 0.1) in the ReSTOR +4 D group. In the intermediate distance the ReSTOR +3 D performed slightly better at 40 cm (0.68 versus 0.56) (logMAR 0.17 ± 0.14 versus 0.24 ± 0.18). The difference was significant (p<0.01) at 70 cm (0.69 versus 0.43) (logMAR 0.16 ± 0.27 vs 0.37 ± 0.2). The superior performance of the ReSTOR +3 D in the intermediate distance was also clearly visible in the defocus curves. All functional tests revealed significantly better results when performed binocularly.

CONCLUSION

The ReSTOR +3 D multifocal intraocular lens performed significantly better in the intermediate distance compared to the ReSTOR +4 D. The other functional tests showed excellent and equal results with both lenses. The reduction of near addition does not increase dysphotopsia, particularly halos. Complaints of unsatisfactory vision in the intermediate distance were reported only by patients with the ReSTOR +4 D. The new ReSTOR +3 D is likely to improve the acceptance of multifocal intraocular lenses.