Visual function of senile cataract patients after implantationofan aspheric multifocalversusan aspheric monofocal intraocular lens / 中国组织工程研究

ABSTRACT

BACKGROUND:Monofocal intraocular lens can restore distant vision of cataract patients, butit is not suitable fornear vision recovery, so most ofpatientsstil need to wear glasses. In contrast, multifocal intraocular lens can make up for the shortcomings of the single lenstoim provenear vision and increase the rate oftaking off the spectacles. OBJECTIVE:To compare the visual function of senile cataract patients after aspheric multifocal and monofocal intraocular lens implantation. METHODS:Totaly 30 senile cataract patients with 50 affected eyes were randomly divided into two groups the eyes were implanted with aspheric multifocal and monofocal intraocular lens as experimental group and control group, respectively. At 3 months after implantation, distance visual acuity at a distance of 5 m, the best corrected distance visual acuity,as wel asnear and intermediate visual acuity at a distance of 30, 60 and 100 cm were detected, respectively. Besides, contrast sensitivity at a spatial frequency of 0.8, 1.5, 6 and 18 cpd under light and dark environment was measured. RESULTS AND CONCLUSION:At 3 months after implantation, the distance visual acuity at a distance of 5 m in the two groups was significantly better than that before surgery (P< 0.05); no significant differences were found in near and intermediate visual acuitiesat a distance of 5 m and 100 cm between two groups, but the near visual acuitiesat a distance of 30 and 60 cm in the experimental group were significantly higher than those in the control group (P< 0.05). In addition, the contrast sensitivity at different spatial frequencies under light environment had no significant differences between two groups; and compared with the control group, contrast sensitivity at the frequency of 6 cpd under dark environment was significantly decreased in the experimental group (P< 0.05), but no significant differences were found in the other spatial frequencies. These results show that aspheric multifocal intraocular lens can significantly improve the near and intermediate visual acuity of senile cataract patients compared with the monofocal lens.