Changes in the posterior corneal surface after femtosecond laser-assisted lenticule intrastromal keratoplasty (LIKE) performed into a pocket (SMI-LIKE) or under a flap (FS-LIKE)

Eye and Vision

Research

Lanhui Yu¹  Xingtao Zhou²  Yu Zhao²  Shengtao Liu³ 

[1] Affiliated Eye Hospital of Nanchang University, Nanchang, China;Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China;NHC Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China;Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China;Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China;Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China;NHC Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Fudan University, Shanghai, China;Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China;Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China;Affiliated Eye Hospital of Nanchang University, Nanchang, China;

关键词: Hyperopia;    Lenticule implantation;    Femtosecond laser;    Posterior corneal elevation;   

DOI  :  10.1186/s40662-023-00337-2

 received in 2022-08-21, accepted in 2023-03-16,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundTo compare the changes in posterior corneal surface after small-incision lenticule intrastromal keratoplasty (SMI-LIKE) and femtosecond laser-assisted lenticule intrastromal keratoplasty (FS-LIKE) for hyperopia correction.MethodsIn this prospective comparative randomized study, 23 eyes with hyperopia were recruited. Eyes were categorized into two groups—SMI-LIKE group (11 eyes) and FS-LIKE group (12 eyes). Lenticules from myopia small incision lenticule extraction were implanted into a pocket (SMI-LIKE group) or at a depth of 100 µm under a flap (FS-LIKE group). Posterior corneal elevations in the center, mid-periphery, and periphery, as well as mean keratometry of the posterior corneal surface (Kmb) were measured using a Pentacam over a three-month follow-up.ResultsAll surgeries were completed successfully and no complications occurred. At one day postoperatively, there was a slight backward change with SMI-LIKE and a forward change with FS-LIKE in the central region of the posterior corneal elevation. Conversely, the peripheral area showed forward displacement in SMI-LIKE and an apparent backward change in FS-LIKE. The mid-peripheral regions manifested a backward change after the procedure throughout the entire follow-up in both groups. Kmb exhibited flattening at one month postoperatively and subsequently returned to its original level at three months after SMI-LIKE while in FS-LIKE, Kmb steepened after lenticule implantation with a significant change noted at one day postoperatively (P = 0.001).ConclusionsPosterior corneal surface after SMI-LIKE and FS-LIKE exhibited different change patterns in various corneal regions, with the most prominent change occurring at one day postoperatively during the three-month follow-up.Trial registration: Chinese Clinical Trial Registry: ChiCTR-ONC-16008300. Registered on Apr 18th, 2016. http://www.chictr.org.cn/edit.aspx?pid=14090&htm=4

【 授权许可】

CC BY   
© The Author(s) 2023

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