Abstract
BackgroundTo investigate refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) to correct high myopia.MethodsSixty seven eyes of 38 patients who underwent ICL V4c implantation were enrolled. The mean preoperative spherical equivalent (SE) was − 12.44 ± 3.15 D (range: − 6.63 to − 20.50 D). The refractive outcomes and optical quality of the eyes at postoperative 1 and 3 months were evaluated and compared.ResultsAt 3 months postoperatively, the mean safety and efficacy indexes were 1.33 ± 0.22 and 1.14 ± 0.23, respectively. The mean SE was − 0.32 ± 0.52 D; no patient lost 1 or more lines of corrected distance visual acuity (CDVA), 13% remained unchanged, 45% gained 1 line and 42% gained 2 or more lines. The mean modulation transfer function cutoff frequency (MTFcutoff), Strehl in two dimensions ratio, and objective scatter index (OSI) were 38.20 ± 9.96 cycles per degree, 0.21 ± 0.06, and 1.00 ± 0.73, respectively. No significant difference was found in any of the above parameters (P > 0.05) between 1 and 3 months. The postoperative intraocular pressure (IOP) did not change when compared with preoperative values (P > 0.05).ConclusionsICL V4c implantation is a safe, effective, and stable solution for high myopia. Patients will acquire high and stable postoperative optical quality. ICL V4c implantation has little influence on IOP.
Highlights
To investigate refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) to correct high myopia
The posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) is a newly developed kind of ICL, which is designed with a 360 μm central hole in the central optical zone
Of the 67 eyes, 92.54% were within ±1.00 D (Fig. 1c, green lines) and 100% were within ±2.00 D of the desired spherical equivalent (SE) refraction (Fig. 1c, purple lines)
Summary
To investigate refractive outcomes and optical quality after implantation of posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) to correct high myopia. Most patients seeking refractive surgery treatments suffer from moderate to high myopia. Laser corneal refractive surgeries to correct myopia have gained wide acceptance in China. The surgery is not safe for patients with high level of refractive error and relatively thin corneas, as these conditions could increase the risk of postoperative corneal ectasia [1]. Phakic intraocular lens implantation could correct a wider range of refractive. The posterior chamber phakic implantable collamer lens with a central hole (ICL V4c) is a newly developed kind of ICL, which is designed with a 360 μm central hole in the central optical zone. Experimental and clinical studies conducted in non-Chinese countries have proved that, by improving the circulation of aqueous humour to the anterior surface of the crystalline lens, the specially designed central hole helps to maintain the
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