AIM: To evaluate the clinical efficacy of the posterior chamber intraocular lens(ICL)implantation for high myopia by the double-pass optical quality analysis system II(OQAS II).

METHODS: A total of 26 eyes of 52 patients with high myopia admitted to the First Affiliated Hospital of Anhui Medical University from December 2017 to December 2018 were selected. All patients underwent ICL implantation. Follow-up to obtain the best corrected visual acuity(BCVA)of all patients. And a series of parameters, such as uncorrected visual acuity(UCVA), object scatter index(OSI), modulation transfer function(MTF), Strehl ratio(SR)and Predicted VA of 100%,20% and 9%,were obtained before and 1wk,1 and 3mo after operation.

RESULTS: Compared with preoperative UCVA and BCVA, the 1wk, 1 and 3mo UCVA were better than preoperative and gradually improved, and the differences were statistically significant(P<0.01). Compared with OSI, MTF, SR and Predicted VA 100%, 20% and 9% before operation, the situation improved at 1wk,1 and 3mo after operation, with statistical significance(P<0.01).

CONCLUSION: ICL implantation can effectively correct high myopia and improve UCVA. Through OQAS II analysis, OSI was reduced after ICL implantation. The postoperative MTF, SR and Predicted VA of 100%, 20% and 9% higher than those before surgery. The visual quality of patients with high myopia was improved after ICL implantation.