Comparison Of 4 Different Keratorefractive Lenticule Extraction(Klex) Techniques (Smile (Zeiss Visumax 500), Smile Pro (Zeiss Visumax 800), Clear (Zeimer Z8), Atos (Schwind)) In Terms Of Postoperative Uncorrected Visual Acuity And Refractive Error
Published 2024 - 42nd Congress of the ESCRS
Reference: FP12.04 | Type: Free paper | DOI: 10.82333/xe4h-ma91
Authors: I-Hung Lin* 1 , Chen-Cheng Chao 2 , Tsung-Jen Wang 3 , Chao-Kai Chang 4
1Nobel Eye Institute,Taipei,Taiwan, Province of China;Department of Ophthalmology,Taipei Medical University Hospital,Taipei,Taiwan, Province of China;Graduate institute of clinical medicine, College of Medicine,National Taiwan University,Taipei,Taiwan, Province of China, 2Nobel Eye Institute,Taipei,Taiwan, Province of China;Graduate institute of clinical medicine, College of Medicine,National Taiwan University,Taipei,Taiwan, Province of China, 3Department of Ophthalmology,Taipei Medical University Hospital,Taipei,Taiwan, Province of China;Department of Ophthalmology, School of Medicine, College of Medicine,Taipei Medical University,Taipei,Taiwan, Province of China, 4Nobel Eye Institute,Taipei,Taiwan, Province of China;Department of Optometry,Yuanpei University,Hsinchu,Taiwan, Province of China
Purpose
To compare the clinical outcomes of four different keratorefractive lenticule extraction(KLEx) techniques: SMILE (Zeiss Visumax 500), SMILE Pro (Zeiss Visumax 800), CLEAR (Zeimer Z8), and ATOS (Schwind) in terms of postoperative uncorrected distance visual acuity (UDVA) and refractive error.
Setting
private practice in a single center with multiple surgeons.
Methods
Data were retrospectively collected from Taipei Nobel Eye Clinic (2023/2/1-2024/1/31). Analysis included 50 SMILE (100 eyes) and 50 SMILE Pro (100 eyes), and 13 CLEAR (26 eyes) and 20 ATOS (40 eyes) patients, focusing on preoperative best-corrected visual acuity (BCVA) and refractive error, and postoperative UDVA and refractive error over a 3-month follow-up.
Results
Across 4 different KLEx techniques groups, ages ranged 28-33 years with consistent preoperative BCVA at 0.00 logMAR. Spherical errors ranged from -4.77 to -5.67D, and cylinder errors ranged from -0.80 to -1.35D preoperatively. Three months post-operation, UDVA was similar across groups(SMILE: 0.02±0.06 logMAR; SMILE Pro: 0.06±0.07 logMAR; CLEAR: 0.03±0.06 logMAR; ATOS: 0.03±0.06 logMAR). Specifically, SMILE Pro exhibited the smallest postoperative average spherical refractive error (-0.08±0.40 D), followed by CLEAR (-0.23±0.47 D), ATOS (-0.23±0.90 D), and SMILE (-0.42±0.43 D). For postoperative average cylinder refractive error, ATOS led (-0.41±0.40 D), followed by CLEAR (-0.45±0.31 D), SMILE (-0.47±0.34 D), and SMILE Pro (-0.47±0.40 D).
Conclusions
Three months after operation, the UDVA outcomes across the four different KLEx techniques were similar, indicating consistent good visual acuity improvement. SMILE Pro may showcase the best results in spherical refractive error correction, while ATOS may be the best in cylinder refractive error adjustment.