ABSTRACT
AlM: To comprehensively evaluate of visual quality after epipolis laser in situ keratomileusis ( EPl-LASlK) in mild to moderate myopia.METHODS: Sixty cases ( 120 eyes ) undergone EPl-LASlK with equivalent diopter ( SE ) were divided into two groups:mild myopia group (60 eyes) and moderate myopia group ( 60 eyes ) . Objective visual acuity, aberration, contrast sensitivity and glare sensitivity were measured before and 1wk; 1, 6mo after operation, and made comparative analysis. RESULTS: Postoperative uncorrected visual acuity ( UCVA ) of two groups were better than that of preoperative(P<0. 05). Postoperative 6mo, there were significant differences on total high RMS between two groups ( P < 0. 05 ). Before operation and 6mo after operation, higher - order aberrations had statistically significant difference between two groups (P<0. 05). After 1wk and 1mo, there were statistical significances at the five frequencies between two groups (P<0. 05). After 6mo, the mild myopia group returned to preoperative levels, however, moderate myopia group in the high frequency region ( 18. 0c/d ) had significant difference with before surgery (P<0. 05). 1wk after surgery, there were statistically significant differences on the 3. 0, 6. 0, 12.0, 18. 0c/d frequency in both groups (all P<0. 05), 1mo after surgery, there were significant difference at 12.0, 18.0c/d frequencies (all P<0.05), after 6mo, both groups returned to preoperative levels, showed no significant difference.CONCLUSlON:Visual quality is poorer in mild myopia patients than that in moderate myopia at early stage after EPl-LASlK. Better visual quality is observed at mid-late stage.