1-year follow-up of phakic implantable collamer lens for low myopia

Resumen

PURPOSE: To evaluate the efficacy, predictability and safety of myopic phakic posterior chamber implantable collamer lens (ICL) to correct low myopia. SETTING: Fernández-Vega Ophthalmological Institute, Oviedo, Spain METHODS: In a prospective noncomparative interventional case series, outcomes in 50 eyes of 39 patients, myopia from –1.00 to –3.00 dioptres (D), were analyzed 12 months after the implantation of myopic ICLs (STAAR Surgical). They comprised uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), slit-lamp examination, refraction, tonometry, endothelial microscopy and ICL vault. RESULTS: The mean UCVA and BCVA after ICL implantation were 0.01±0.01 logMAR (range from 0.01 to 0) and 0.003±0.012 logMAR (range from 0.046 to 0), respectively. The efficacy index was 0.99. No eyes lost 1 o more than 1 lines, 44 eyes did not change after surgery, and 6 eyes gained 1 line of visual acuity. The safety index was 1.01. The BCVA after ICL implantation was statistically significantly better than the BCVA before surgery (P=0.00638). Spherical equivalent (SE) was within ±1.00D of the desired refraction in all cases and 98% within ±0.50D. Mean postoperative SE was –0.09±0.12D at 12 months. No cases of anterior subcapsular opacities were detected. Postoperative endothelial cell count was 2828±461 cell/mm2 (range from 2050 to 4239 cell/mm2). Vaulting after 1 year of follow-up was 2.24±0.77 and postoperative intraocular pressure was 11.72±1.30 mmHg. CONCLUSIONS: Myopic ICL implantation was a safe, effective, and predictable procedure for the correction of low myopia.