Biomechanical Effects of tPRK, FS-LASIK, and SMILE on the Cornea

被引:24
|
作者
Xin, Yue [1 ]
Lopes, Bernardo T. [2 ]
Wang, JunJie [1 ,3 ]
Wu, Jie [1 ]
Zhu, ManMan [1 ]
Jiang, MuChen [1 ]
Miao, YuanYuan [1 ]
Lin, HuiNi [4 ]
Cao, Si [5 ]
Zheng, XiaoBo [1 ,3 ]
Eliasy, Ashkan [2 ]
Chen, ShiHao [1 ,3 ]
Wang, QinMei [1 ,3 ]
Ye, YuFeng [1 ]
Bao, FangJun [1 ,3 ]
Elsheikh, Ahmed [2 ,6 ,7 ,8 ]
机构
[1] Wenzhou Med Univ, Eye Hosp, Wenzhou, Peoples R China
[2] Univ Liverpool, Sch Engn, Liverpool, England
[3] Wenzhou Med Univ, Inst Ocular Biomech, Wenzhou, Peoples R China
[4] CUHK Joint Shantou Int Eye Ctr, STU, Shantou, Peoples R China
[5] Wuhan Puren Hosp, Wuhan, Peoples R China
[6] Moorfields Eye Hosp NHS Fdn Trust, Natl Inst Hlth Res NIHR, Biomed Res Ctr Ophthalmol, London, England
[7] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Beijing, Peoples R China
[8] UCL, Inst Ophthalmol, London, England
基金
中国国家自然科学基金;
关键词
biomechanical response; in-vivo; tPRK; FS-LASIK; SMILE; INCISION LENTICULE EXTRACTION; TRANSEPITHELIAL PHOTOREFRACTIVE KERATECTOMY; CORRECTED INTRAOCULAR-PRESSURE; IN-SITU KERATOMILEUSIS; LASER-ASSISTED LASIK; RESPONSE PARAMETERS; BILATERAL ECTASIA; CROSS-LINKING; TISSUE; FLAP;
D O I
10.3389/fbioe.2022.834270
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Purpose: The objective of this study is to evaluate the in vivo corneal biomechanical response to three laser refractive surgeries.Methods: Two hundred and twenty-seven patients who submitted to transepithelial photorefractive keratectomy (tPRK), femtosecond laser-assisted in-situ keratomileusis (FS-LASIK), or small-incision lenticule extraction (SMILE) were included in this study. All cases were examined with the Corvis ST preoperatively (up to 3 months) and postoperatively at 1, 3, and 6 months, and the differences in the main device parameters were assessed. The three groups were matched in age, gender ratio, corneal thickness, refractive error corrections, optical zone diameter, and intraocular pressure. They were also matched in the preoperative biomechanical metrics provided by the Corvis ST including stiffness parameter at first applanation (SP-A1), integrated inverse radius (IIR), deformation amplitude (DA), and deformation amplitude 2 mm away from apex and the apical deformation (DARatio2mm).Results: The results demonstrated a significant decrease post-operation in SP-A1 and significant increases in IIR, DA, and DARatio2mm (p < 0.05), all of which indicated reductions in overall corneal stiffness. Inter-procedure comparisons provided evidence that the smallest overall stiffness reduction was in the tPRK group, followed by the SMILE, and then the FS-LASIK group (p < 0.05). These results remained valid after correction for the change in CCT between pre and 6 months post-operation and for the percentage tissue altered. In all three surgery groups, higher degrees of refractive correction resulted in larger overall stiffness losses based on most of the biomechanical metrics.Conclusion: The corneal biomechanical response to the three surgery procedures varied significantly. With similar corneal thickness loss, the reductions in overall corneal stiffness were the highest in FS-LASIK and the lowest in tPRK.
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页数:9
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