Original Article
Comparison of influence among three types of corneal refractive surgeries on corneal biomechanical properties
Zou Pengfei, Zhao Hong, Zhao Xiaojin
Published 2022-04-05
Cite as Chin J Ocul Traum Occupat Eye Dis, 2022, 44(4): 253-259. DOI: 10.3760/cma.j.cn116022-20211022-00412
Abstract
ObjectiveTo compare the influence on the postoperative corneal biomechanical properties among three ametropia surgical methods: small incision lenticule extraction (SMILE), femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) and smart pulse technology-assisted transepithelial photorefractive keratectomy (SMART).
MethodsThis was a retrospective case control study.The clinical data of 300 eyes of 150 cases from Jun.2019 to Jun.2020 in Zhengzhou Municipal Second People’s Hospital for corneal refractive surgery were analyzed.They were divided into three groups based on different surgical approach: SMILE group, FS-LASIK group, and SMART group, with 100 eyes of 50 cases in each group.The influence among the three groups on corneal biomechanial parameters was compared, including time of first applanation, time of second applanation, maximum deformation amplitude of highest concavity and distance between both non-deformed peaks.
ResultsThere were no statistical difference in the safety index or effective index among the three groups (P>0.05). There were significant differences in time of first applanation among the three groups at different times after operation (Fgroup =74.71, P<0.001; Ftime=7.23, P=0.001). The differences in time of second applanation, maximum deformation amplitude of highest concavity and distance between both non-deformed peaks were statistically significant among the three groups (Fgroup=49.21, P<0.001; Fgroup=12.00, P<0.001; Fgroup=3.85, P=0.022), there was no significant difference in time of second applanation, maximum deformation amplitude of highest concavity and distance between both non-deformed peaks at different times after operation (Ftime=0.34, P=0.711; Ftime=0.02, P=0.978; Ftime=0.14, P=0.863). There were no significant difference in time of first applanation, time of second applanation, maximum deformation amplitude of highest concavity and distance between both non-deformed peaks between SMILE group and SMART group (P=0.709, 0.942, 0.913, 0.978). Compared with FS-LASIK, the other two surgical methods had significant differences (all P<0.05).
ConclusionThe three surgical methods are all safe and effective.SMILE and SMART have advantages over FS-LASIK in terms of corneal biomechanical stability.
Key words:
Myopia; Corneal surgery, laser; Biomechanical phenomena; Corneal
Contributor Information
Zou Pengfei
Department of Ophthalmology, Zhengzhou Municipal Second People’s Hospital, Zhengzhou Eye Institute, Zhengzhou 450006, China
Zhao Hong
Department of Ophthalmology, Zhengzhou Municipal Second People’s Hospital, Zhengzhou Eye Institute, Zhengzhou 450006, China
Zhao Xiaojin
Department of Ophthalmology, Zhengzhou Municipal Second People’s Hospital, Zhengzhou Eye Institute, Zhengzhou 450006, China
