Objective visual quality one year after toric IOL implantation for correction of moderate and high corneal astigmatism

● AIM: To compare the objective visual quality after implantation of a toric intraocular lens(IOL) in order to correct moderate or high corneal astigmatism at the one year postoperative follow-up.● METHODS: From December 2017 to June 2018, 66 patients(90 eyes) with simple age-related cataract with regular corneal astigmatism greater than 1.5 D were enrolled in this prospective self-control study. The patients were implanted with Proming? toric IOL(model: AT3 BH-AT6 BH). The subjects were divided into moderate astigmatism group(46 eyes, 1.5-2.5 D) and high astigmatism group(44 eyes, >2.5 D). The uncorrected distance visual acuity, residual astigmatism and axial position of IOL were observed before operation, 3, 6 mo and 1 y after operation. Modulation transfer function cutoff(MTF cutoff), Strehl ratio(SR), object scatter index(OSI) were observed by OQAS II to evaluate the objective visual quality of patients.● RESULTS: There was no significant difference in UCVA, residual astigmatism, axial deviation, MTF cutoff, SR and OSI between moderate and high astigmatism group(all P>0.05). After 3 mo, UCVA, MTF cutoff and SR were significantly increased(all P<0.05), residual astigmatism and OSI were significantly decreased(all P<0.05). After 3 mo, all the indexes remained stable.● CONCLUSION: Proming toric IOL can effectively treat age-related cataract patients with moderate-to-high regular corneal astigmatism, correcting corneal astigmatism, improving UCVA, ensuring long-term stability in the capsule, and providing patients with better visual quality.