ABSTRACT
AlM: To compare the impact of different thickness of corneal cap design on small incision lenticule extraction ( SMlLE) operation.METHODS: Forty-six cases of myopia patients ( 92 eyes) intends to SMlLE operation in our hospital were collected , and were randomly divided into 2 groups:corneal cap thickness design for 110μm in group A and 120μm in group B. Other operation parameters designs were consistent. All patients were surgeried by the same surgeon. The incidence of opaque bubble layer ( OBL ) , the ratio of difficult separation of lens, uncorrected visual acuity ( UCVA ) of each time points, and spherical equivalent ( SE) were compared.RESULTS: lntraoperative OBL incidence rate of 110μm group was higher than that of 120μm group with significant difference between the two group (P0. 05). SE were compared at 7d and 6mo after operation, showed no significant difference (P>0. 05)CONCLUSlON: Compared with 120μm group, corneal cap design SMlLE operation in 110μm group are more prone to OBL and difficult separation of lens, thus affects UCVA and postoperative recovery rate. There is no significant difference in long-term UCVA.