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Pre- and postoperative Avanti spectral-domain optical coherence tomography (SD-OCT; Optovue Inc., CA, USA) provided stromal and epithelial thickness maps. The difference between pre- and postoperative central stromal thicknesses at the corneal vertex was used to calculate the achieved stromal thickness ablation depth. This value was then compared with the corresponding central nominal depth on the laser ablation planning map.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A total of 40 eyes (OD\/OS:18\/22) of 40 patients (31.4\u2009\u00b1\u20099.2 years) were available for evaluation. The mean treated spherical equivalent was\u2009\u2212\u20092.98\u2009\u00b1\u20091.46 D. The mean nominal and achieved central stromal ablation depths were 51.22 \u00b5m and 59.67 \u03bcm, respectively, showing a mean stromal excessive ablation of 16.50%. The mean pre- and postoperative central epithelial thicknesses were 53.74 \u03bcm and 59.31 \u03bcm, respectively, showing a mean postoperative thickness increase of 10.46%. This increase in the epithelial thickness rendered the mean postoperative pachymetry reduction to 54.11 \u03bcm, only 2.33% greater than the mean nominal ablation depth.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The study revealed a central stromal ablation 16.50% greater than the nominal ablation depth. This excessive stromal removal was largely compensated for by the increase in epithelial thickness, resulting in a mean difference between the nominal ablation depth and the achieved central corneal pachymetry reduction of only 2.33%. This significant excessive central stromal ablation must be taken into consideration in the calculation of the residual stromal thickness.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s40662-024-00404-2","type":"journal-article","created":{"date-parts":[[2024,9,2]],"date-time":"2024-09-02T08:02:50Z","timestamp":1725264170000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Nominal and achieved stromal ablation depth after myopic transepithelial photorefractive keratectomy: implications for residual stromal thickness calculation"],"prefix":"10.1186","volume":"11","author":[{"given":"Yue","family":"Feng","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tore Arnstein","family":"Nitter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xu","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1363-4689","authenticated-orcid":false,"given":"Aleksandar","family":"Stojanovic","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,9,2]]},"reference":[{"key":"404_CR1","doi-asserted-by":"publisher","first-page":"37","DOI":"10.1016\/j.ophtha.2007.03.073","volume":"115","author":"JB Randleman","year":"2008","unstructured":"Randleman JB, Woodward M, Lynn MJ, Stulting RD. 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The manuscript has been approved for publication by all authors and we declare that the work described is based on original research that has not been published previously, and not under consideration for publication elsewhere, in whole or in part.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"Author Aleksandar Stojanovic\u00a0is a member of the editorial board for Eye and Vision. The other\u00a0authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"36"}}