Long-term observation on safety and visual quality of implantable collamer lens V4c implantation for myopia correction: a 5-year follow-up

Xiao Chen; Li Li; Jing Rao; Yue-Xi Chen; Yang Gao; Rui-Xue Huang; Qi-Zhi Zhou

doi:10.18240/ijo.2023.07.18

Long-term observation on safety and visual quality of implantable collamer lens V4c implantation for myopia correction: a 5-year follow-up

Int J Ophthalmol. 2023 Jul 18;16(7):1123-1129. doi: 10.18240/ijo.2023.07.18. eCollection 2023.

Authors

Xiao Chen^{1

2}, Li Li^{2

3}, Jing Rao², Yue-Xi Chen⁴, Yang Gao², Rui-Xue Huang², Qi-Zhi Zhou^{1

2

3}

Affiliations

¹ Aier Eye Hospital, Jinan University, Guangzhou 510071, Guangdong Province, China.
² Chongqing Aier and Vision Care Hospital, Chongqing 400000, China.
³ Aier Eye Hospital Group Company Limited, Changsha 410000, Hunan Province, China.
⁴ Jinan University, Guangzhou 510000, Guangdong Province, China.

Abstract

Aim: To elucidate the safety and visual quality of implantable collamer lens with central hole (ICL V4c) implantation for correcting moderate and high myopia for at least 5y.

Methods: This retrospective study was conducted on 58 patients (114 eyes) who were followed up for at least 5y after ICL V4c implantation. The observation was done before and on 1d, 1mo, 1 and 5y or more after the surgical procedure. The visual acuity, subjective refraction, intraocular pressure, vault, axial length, central hole position, pupil diameter, visual quality, and adverse events were analyzed. The visual quality includes aberration, the modulation transfer function cutoff frequency (MTF cutoff), objective scattering index (OSI), Stroller's ratio (SR), and visual quality questionnaire.

Results: The average follow-up period was 69.25±3.80mo (range 60-82mo) and the preoperative spherical equivalent (SE) was -8.66±1.97 D. At 5y after operation, the safety index was 1.01±0.02 and the efficacy index was 0.99±0.42 and SE was -0.65±0.63 D. The 59.6% of the eyes achieved an uncorrected distance visual acuity of 20/20, 76.3% of the eyes had SE within ±1.0 D at the last visit. The axial length increased by 0.29±0.71 mm 5y after the surgery (t=-3.843, P<0.001). The mean vault at the last follow-up was 510.59±245.61 µm. The central hole was on the temporal side in 80 eyes (84.2%). The visual quality questionnaire showed that 98.2% patients were satisfied with the surgical procedure. Adverse events occurred in 4 eyes (3.5%), including the posttraumatic toric ICL rotation (2 eyes), iris incarceration (1 eye), and posttraumatic ICL displacement (1 eye) at the last follow-up.

Conclusion: Long-term ICL V4c implantation is safe, effective, and stable for correcting moderate and to high myopia, and the visual quality with patients is excellent and satisfactory, but the progression of axial length still needs attention after surgery.

Keywords: implantable collamer lens with central hole; myopia correction; refractive surgery; visual quality.

International Journal of Ophthalmology Press.