Optical Performance Of Enhanced Monofocal Intraocular Lens In Presence Of Corneal Astigmatism

To evaluate the optical performance of enhanced monofocal intraocular lens in presence of cataract and low degree of corneal astigmatism

A prospective comparative, non-randomized study was conducted at a tertiary care eye centre in India from June 2022 to May 2023 to compare results of enhanced monofocal IOL with the standard monofocal IOL in cases of cataract with corneal astigmatism >/= 0.75 D and < 1.5 D

A total of 38 patients fulfilling the inclusion criteria were included in the study. Group A patients (19) were implanted with Enhanced Monofocal intraocular lens bilaterally and Group B patients (19) were implanted with standard Monofocal intraocular lens bilaterally. Both groups underwent standard procedures (Phacoemulsification with Intraocular lens implantation in the capsular bag) and final outcomes were analysed at 3 months follow up. p value < 0.05 was considered as significant.

The binocular uncorrected intermediate visual acuity, near visual acuity and contrast sensitivity at 3 months was better in enhanced monofocal group as compared to the standard monofocal group. (p<0.001, p<0.001, p=0.02 respectively). The binocular uncorrected distance visual acuity at 3 months was comparable in both the groups (p=0.2); however, the percentage of patients achieving visual acuity >/= 20/30 was significantly higher in Enhanced monofocal group (p=0.007). The post-operative higher-order aberrations were comparable in both the groups. (p=0.125)

Bilateral implantation of enhanced monofocal IOLs in patients with cataract and low degrees of corneal astigmatism shows better tolerance to astigmatism as compared to standard monofocal IOLs. In cases with < 1 D corneal astigmatism, the Enhanced Monofocal IOL is preferred IOL choice as compared to standard monofocal IOL.