AIM:To evaluate the efficacy and safety of the surgical correction of high myopia using a posterior chamber phakic implantable contact lens(PCPICL).

METHODS: Totally 79 eyes of 43 consecutive patients undergone ICL implantation or toric implantable contact lens(TICL)up to 2a postoperative were retrospectively analyzed. Visual acuity, refraction, intraocular pressure(IOP), average cornea endothelial cell density(ECD), central vault of the ICL and slit-lamp findings, etc. at 1d～2a after operation were observed.

RESULTS: The uncorrected visual acuity(UCVA)of all eyes was significantly improved from preoperative 3.49±0.24 to postoperative 4.89±0.17. Best corrected visual acuities(BCVA)didn't decline after operation and 91%(72 eyes)of UCVAs were better than preoperative BCVAs. The preoperative spherical equivalent was -12.14±4.14 diopters(D)while it was -0.43±0.90D at last follow-up. The difference on IOP at 1d after operation(14.82±3.46mmHg)and preoperative(15.59±2.66mmHg)had statistical significance(P<0.05), while there was no significant difference between last follow-up(15.77±2.36mmHg)and preoperative. The vaults of 1a(481±219μm)and 2a(475±196μm)after operation decreased comparing with that of 6mo(502±225μm). And the ECD of 6mo, 1 and 2a after operation slightly decreased comparing with that of preoperative. The corneal endothelial loss was 5.9%, 6.7%, 8.2% respectively. No severe complications occurred expect that 2 eyes appeared anterior lens capsules had limited opacities and the visual acuities didn't degrade with dispose in time. Other complications such as macular hemorrhage, retinal detachment, etc. were not found.

CONCLUSION: After 2a of follow-up,ICL implantation has good visual and refractive results with excellent biocompatibility and few adverse reactions. By accurate preoperative examination and measurement, intraoperative fine operation and close observation of postoperative follow-up, the complications can be effectively prevented. It still needs further observation and analysis of the cause and long-term effects of postoperative vault decline.