Reason analysis and preventive treatment countermeasure of impaired vision after LASlK / 国际眼科杂志(Guoji Yanke Zazhi)

ABSTRACT

To analyze the reasons of impaired vision after LASlK and explore its preventive treatment measures preliminarily.METHODS: ln this retrospective study, 175 eyes of 134 patients whose vision was decreased after LASlK were included. The constituent ratio of every reason was counted and uncorrected visual acuity ( UCVA ) between pre-treatment and post-treatment were compared by paired t-test respectively.RESULTS:The overall incidence of impaired vision after LASlK was 1. 86%. The constituent ratio of regression was 51. 43% and UCVA increased from 0. 61±0. 22 to 0. 90±0. 38 (t=8. 00, P<0. 001) after treatment. The constituent ratio of punctate corneal epithelial defect was 32. 57% and UCVA increased from 0. 60±0. 19 to 1. 20±0. 24 (t=20. 00, P<0. 001 ) after treatment. The constituent ratio of accommodative spasm was 5. 14% and UCVA increased from 0.76±0. 21 to 1. 32±0. 22 (t=8. 14, P<0. 001) after treatment. The constituent ratio of corneal flap shift and gauffer was 4% and UCVA increased from 0. 29 ± 0. 26 to 1. 24 ± 0. 28 ( t = 6. 33, P<0. 001 ) after treatment. The constituent ratio of corticosteroid - induced ocular hypertension was 4% and UCVA increased from 0. 57±0. 05 to 1. 0 ± 0. 16 ( t= 2. 53, P<0. 05 ) after treatment. The constituent ratio of fundus lesions and diffuse lamellar keratitis ( DLK) was 2. 86% and UCVA all increased by different degrees after treatment.CONCLUSlON The reasons of impaired vision after LASlK are many and varied. These cases could recover their vision by discovery and treatment in time, and the appropriate preventive measures were essential.