Comparison Of Clinical Results After The Implantation Of Different Types Of Intraocular Lens

Objective :To compare the efficacy of different types of intraocular lens(IOL) implantation for age-related cataract.Methods :A retrospective case series. Clinical data of 162 cases for age-related cataract patients, were collected from April 2014 to December at our hospital and all subjects were divided into three groups: simple cataract surgery combined with the spherical Rayner(RN) IOL implantation in 44 eyes(experimental group), zero spherical aberration AO IOL implantation in 56 eyes and negative spherical aberration ZCB IOL implantation in 48 eyes. The differences in patients, age, preoperative uncorrected distance visual acuity and axial length among three groups were not statistically significant(P> 0.05). The corneal astigmatism of all patients were less than 0.75 D. Uncorrected distance visual acuity, best corrected distance visual acuity, uncorrected near visual acuity and best corrected near vision were assessed preoperatively,1 week, 1 month and 3 months after the surgery. And the intraocular spherical aberration of the patients in 3 groups were assessed 3 months after the surgery. The intraocular spherical aberration of all subjects were measured by using the Ray tracing methed with pupil diameters of 4.0mm.Results:After three months, there were not statistically significant differences in UCVA,BCVA, UNVA and BCNA among three groups. After three months there was statistically significant difference among groups in intraocular spherical aberration. According to the data of corneal spherical aberration, the intraocular spherical aberration of patients in each group was divided into 3 grades. It is founded that the intraocular spherical aberration had no statistically significant defferences among groups when the corneal spherical aberration grade was less than 0.15μm or greater than 0.45μm. However,there was statistically significant difference when corneal spherical aberration grade was from 0.15μm to 0.45μm.ConclusionOur earlier observation shows that negative spherical aberration IOL implantation is superior to traditional spherical IOL and aspheric IOL.