Clinical observation of implantation of implantable collamer lens for refractive regression after excimer laser photorefractive keratectomy

Abstract

Objective To observe the clinical effect of the implantation of implantable collamer lens (ICL) for refractive regression after excimer laser photorefractive keratectomy.Methods From August 2012 to May 2013,14 eyes of 8 patients from Refractive Surgery Center of Tongji Hospital with refractive regression after excimer laser refractive surgery were enrolled and corrected with ICL implantation.Before and 6 months after surgery,visual acuity,refractions,iridocorneal angles (0°,180°),central anterior chamber depth (CACD),anterior chamber volume (ACV),endothelial cell density (ECD) and ICL central vault were examined and statistically analyzed.Results Six months after surgery,the uncorrected visual acuity (UCVA) of 14 eyes achieved preoperative best corrective visual acuity (BCVA),refractions decreased significantly,the difference was statistically significant (P ＜ 0.05); iridocorneal angles (0°,180°),CACD and ACV were lower than that before surgery,the differences were statistically significant (P ＜0.05); the ECD decreased by 10.33％ compared with preoperative ECD,the difference was statistically significant (P ＜0.05); there were no statistical difference between IOPs of pre-and 6 months post-surgery (P ＞0.05); during six months after surgery,ICLs had no contact with lens,and no closure of anterior chamber angle was observed.Conclusions ICL implantation for refractive regression after excimer laser refractive surgery is safe and effective.However,more clinical investigations are needed to clarify its long term outcome. Key words: Refractive regression; Phakic eye; Posterior chamber intraocular lens