Short-term Evaluation of Visual Quality, Amplitude of Accommodation, and Stereoacuity Between Patients With Moderate-to-High Myopia Who Underwent ICLV4c Implantation and SMILE

Abstract

PURPOSE: To compare the visual quality, accommodation, and stereoacuity between patients with a myopia magnitude of −3.00 to −8.50 diopters (D) who underwent ICLV4c (STAAR Surgical) implantation and small incision lenticule extraction (SMILE). METHODS: The visual quality parameters, amplitude of accommodation (AMP), and stereoacuity were compared between and within the ICLV4c and SMILE groups (40 eyes/group) with a mean spherical equivalent (SE) of −6.14 D. Differences in these parameters before and after surgery were analyzed using SPSS 22.0 software (SPSS, Inc). RESULTS: Modulation transfer function (MTF) cut-off increased significantly by 3.24 cycles/degree ( t = −2.111, P = .041) and AMP decreased significantly by 1.66 D ( t = 7.519, P < .001) from baseline to 3 months after surgery in the ICLV4c group. However, the MTF cut-off was significantly lower ( t = 2.123, P = .037) and the AMP was significantly better ( t = −3.605, P = .001) in the SMILE group than in the ICLV4c group at 3 months postoperatively. Other parameters such as Objective Scatter Index, Strehl ratio, and Optical Quality Analysis System (Visiometrics) under different contrast values did not show significant changes ( P > .05). Stereoacuity did not improve significantly, except in a patient with anisometropia (2.50 D) in the ICLV4c group. CONCLUSIONS: The ICLV4c implantation yielded a better visual quality but worse AMP than did SMILE in patients with a myopia magnitude of −3.00 to −8.50 D in the short term. [ J Refract Surg . 2022;38(10):632-640.]