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. 2019 Oct 14;13:2003–2015. doi: 10.2147/OPTH.S215144

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© 2019 Ong et al.

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Percentage tissue altered (PTA) of eyes in study had laser in-situ keratomileusis (LASIK) been performed; these eyes subsequently underwent small incision lenticule extraction (SMILE) or laser-assisted sub-epithelial keratectomy (LASEK) procedures. (A) Scatter plot of PTA based on a LASIK flap thickness of 120μm highlighting patients with 36 months follow-up showing a significant proportion of eyes having PTA ≥40%; (B) bar chart showing the proportion of patients in the study with PTA above fixed thresholds of 30%, 40%, and 45% assuming different LASIK flap thicknesses.