ArticleBMC ophthalmology2024
Comparison of long-term changes in the effective optical zone following SMILE and FS-LASIK for moderate and high myopia.
Article in BMC ophthalmology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Effect of ablation-zone diameter on whole-corneal higher-order aberrations after LASEK: a retrospective study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026Article
- Comparative clinical outcomes of SMILE, femtosecond LASIK, and transepithelial PRK: a multicenter Iraqi study.Frontiers in ophthalmology · 2026Article
- Influence of axial length and myopia severity on the achieved optical zone in KLEx surgery: a pilot study.European journal of medical research · 2025Article
- Impact of preoperative anterior topographic parameters on effective optical zone after keratorefractive lenticule extraction and wavefront-guided LASIK.International journal of ophthalmology · 2025Article
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Authors and funding
7 authors.
Funding
Abstract
backgroundVisual quality after corneal refractive surgery is linked to the postoperative effective optical zone (EOZ). This study aims to compare long-term changes in the EOZ following small incision lenticule extraction (SMILE) and femtosecond laser-assisted in-situ keratomileusis (FS-LASIK) for moderate and high myopia.
methodsThis study included 42 patients (72 eyes) who underwent either SMILE (36 eyes) or FS-LASIK (36 eyes). A custom software program based on the tangential curvature difference map of the Pentacam HR (Oculus Optikgeräte GmbH) was used to define the EOZ at 3 and 7 years postoperatively. The EOZ, its chronological changes compared to the programmed optical zone (POZ), and the corneal wavefront aberrations following SMILE and FS-LASIK were analyzed. Correlations between the EOZ changes and relevant parameters were evaluated.
resultsThree years postoperatively, EOZ following SMILE and FS-LASIK were 5.13 ± 0.27 mm and 4.70 ± 0.24 mm (P < 0.001), respectively. Seven years postoperatively, EOZ following SMILE and FS-LASIK decreased to 5.03 ± 0.28 mm and 4.63 ± 0.23 mm (P < 0.001), respectively. At postoperative 7 years, the percentages of EOZ/POZ were negatively correlated with Q-value changes (β = -5.120, P = 0.009) following SMILE and positively correlated with the cylinder correction (β = 1.184, P = 0.004) following FS-LASIK. The induced spherical aberrations in the SMILE group were less than those in the FS-LASIK group (P < 0.05) and were negatively correlated with the EOZ/POZ (β = -16.653, P < 0.001).
conclusionsThe EOZ following SMILE was larger than that following FS-LASIK in the long postoperative term for moderate and high myopia. Furthermore, a continual reduction in the EOZ was noted after both surgical modalities.
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