Effects of LASIK on Biomechanical Properties of Human Cornea
10.16156/j.1004-7220.2020.03.07
- VernacularTitle:LASIK手术对人眼角膜生物力学性能的影响
- Author:
Chunsheng LIU
1
;
Kechao ZHAO
2
;
Xiaojun WANG
1
;
Weiyi CHEN
2
;
Rui HE
3
Author Information
1. School of Biomedical Engineering, School of mechanical and Transportation Engineering, Taiyuan University of Technology
2. School of Biomedical Engineering, Taiyuan University of Technology
3. Department of Excimer Laser, Shanxi Eye Hospital
- Publication Type:Journal Article
- Keywords:
corneal visualization scheimpflug technology（Corvis ST）;
refractive surgery;
corneal viscosity;
corneal stiffness
- From:
Journal of Medical Biomechanics
2020;35(3):E304-E310
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the changes in biomechanical properties of human cornea after laser in situ keratomileusis (LASIK) and predict corneal stiffness after the LASIK surgery. Methods According to the measurement results from corneal visualization scheimpflug technology (Corvis ST), the corneal tangent stiffness coefficient (STSC) and energy absorbed area (Aabsorbed) were calculated. The change patterns of corneal stiffness and viscosity after refractive surgery were analyzed. Results The difference of corneal STSC and Aabsorbed before and after LASIK had a statistical significance (P<0.05). The obtained formula for predicting corneal stiffness after refractive surgery was: Sbefore surgery =1.055bIOPbefore surgery + 0.015CCTbefore surgery，Safter surgery =0.937Sbefore surgery +0.019CCTafter surgery. Conclusions LASIK surgery not only changes corneal thickness, but also reduces corneal stiffness and viscosity. Prediction of corneal stiffness after surgery can provide guidance for the design of clinical surgery and improve the safety of surgery.
