Abstract
PURPOSE: To assess the refractive and visual outcomes after implantation of an isofocal optic-design intraocular lens (IOL) with double C-loop haptics following cataract surgery in Japanese eyes. METHODS: This was a single-centre prospective study considering 38 eyes of 19 patients who were implanted with the Isopure Serenity (Beaver-Visitec International, Inc. [BVI], Waltham, USA) IOL. This study analysed the refractive (sphere, cylinder and axis) and visual outcomes at 3 months post-surgery. Specifically, the visual performance was analysed by measuring monocular uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), uncorrected intermediate visual acuity (UIVA) and distance-corrected intermediate visual acuity (DCIVA) at 80 and 66 cm, uncorrected near visual acuity (UNVA), and distance-corrected near visual acuity (DCNVA) at 40 cm. The photopic binocular defocus curve was also measured. RESULTS: About 100% of the eyes were within ±1.00D and 89.47% of the eyes within ±0.50D; the mean postoperative spherical equivalent was 0.12 ± 0.35D. The mean refractive cylinder was -0.11 ± 0.33D. 89.47% and 97.37% of patients presented a cumulative monocular UDVA and CDVA value of ≥20/20, respectively. About 57.89% and 42.11% of patients presented a monocular DCIVA value of ≥20/32 at 80 and 66 cm, respectively. About 55.26% of patients presented a monocular DCNVA value of ≥20/40. The mean monocular CDVA, DCIVA at 80 cm, DCIVA at 66 cm, and DCNVA were -0.08 ± 0.05, 0.23 ± 0.13, 0.28 ± 0.13 and 0.35 ± 0.14 logMAR, respectively. The through-focus curve showed good visual acuity at far and intermediate distances with a depth-of-focus value of about 1.75D. CONCLUSION: Our current clinical study shows that the implantation of the new isofocal optic-design IOL with double C-loop haptics results in accurate refractive outcomes with excellent visual performance for distance vision and functional intermediate vision in Japanese eyes. The outcomes obtained evidence that this new IOL model is an effective option extending the range of vision when correcting aphakia.