Evaluation of objective visual quality after corneal cross-linking using double-pass analysis system
10.3980/j.issn.1672-5123.2016.6.54
- VernacularTitle:运用双通道视觉质量分析系统评估角膜交联手术后的客观视觉质量
- Author:
Meng-Meng, WANG
;
Kun-Feng, DONG
;
Jun-Hong, ZHANG
;
Ke, DIAO
;
Rui-Fang, LI
;
Yi, CAI
- Publication Type:Journal Article
- Keywords:
double - pass analysis system;
keratoconus;
cross-linking;
subjective visual quality
- From:
International Eye Science
2016;16(6):1196-1198
- CountryChina
- Language:Chinese
-
Abstract:
?AIM:To evaluate the objective visual quality of patients who underwent corneal cross-linking for the keratoconus using double-pass analysis system.? METHODS: Advanced keratoconus patients who underwent UV - riboflavin corneal cross - linking from January to July 2015 were included. The outcomes of their objective scattering index ( OSI ) , predicted visual acuity ( VA ) , the cut - off frequency of modulation transfer function ( MTF cut- off ) , the Strehl ratio ( SR ) were compared before and 6mo after corneal cross-linking.?RESULTS: A total of 13 patients ( 16 eyes ) were included. There was no statistically significant difference between pre- and 6mo postoperative data in uncorrected visual acuity, best corrected visual acuity, refractions and mean value of Sim-k (P>0. 05). Non-invasive average tear film break up time ( NIAvg-BUT ) detected by the Sirius system decreased after corneal cross-linking ( P<0. 05 ) . Using double - pass analysis system, no statistically significant change was found in MTF cut off, Strehl Ratio, OSI before and after treatment(P>0. 05). Tear Film Analysis Mean OSI increased at 6mo postoperatively (P<0. 05).? CONCLUSION: The subjective visual quality isn’t effected by corneal cross-linking. The tear stabilities of patients are influenced by these operations at 6mo postoperatively. More observations on long-term effect are needed to be taken in the future.
