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This was a retrospective, matched, and case\u2013control study (1:2) controlled for preoperative central corneal thickness and refractive error that compared early refractive and visual outcomes after SMILE using VISUMAX 800 and VISUMAX 500 to treat myopia. We included 50 eyes that underwent the VISUMAX 800 SMILE and 100 eyes that underwent the VISUMAX 500 SMILE. SMILE using VISUMAX 800 was performed using the CentraLign aid for vertex centration. Cyclotorsion was controlled by an OcuLign assistant in the VISUMAX 800 group after corneal marking. Corneal higher-order aberrations (HOAs) were evaluated using a Pentacam 1\u00a0month after surgery. No differences were observed in the pre- and post-operative refractive and visual outcomes at 1\u00a0day, 1\u00a0month, and 6\u00a0months after surgery. VISUMAX 800 induced less total HOAs than VISUMAX 500 (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009=\u20090.036). No statistically significant differences were observed in the amounts of induced spherical aberrations or vertical and horizontal comas. No differences were observed in the 1\u00a0month and 6\u00a0months refractive and visual outcomes between two SMILE procedures, except for VISUMAX 800, which resulted in lower postoperative total HOAs than VISUMAX 500.\n                  <\/jats:p>","DOI":"10.1038\/s41598-024-62354-y","type":"journal-article","created":{"date-parts":[[2024,5,25]],"date-time":"2024-05-25T07:01:39Z","timestamp":1716620499000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":41,"title":["Comparison of early visual outcomes after SMILE using VISUMAX 800 and VISUMAX 500 for myopia: a retrospective matched case\u2013control study"],"prefix":"10.1038","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0890-8614","authenticated-orcid":false,"given":"Tae Keun","family":"Yoo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongyoung","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung Soo","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hee Sun","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ik Hee","family":"Ryu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"In Sik","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin Kuk","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kun-Hoo","family":"Na","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,5,25]]},"reference":[{"key":"62354_CR1","doi-asserted-by":"publisher","first-page":"1036","DOI":"10.1016\/j.ophtha.2016.01.006","volume":"123","author":"BA Holden","year":"2016","unstructured":"Holden, B. 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They received salaries or stocks as part of their standard compensation packages. This company supplied the study tools. Kun-Hoo Na, Tae Keun Yoo, Hee Sun Kim, Ik Hee Ryu, In Sik Lee, and Jin Kuk Kim are clinicians of the B&VIIT Eye Center, Seoul. This study compared two products from the same company (Carl Zeiss Meditec AG), but there are no conflicts of interest related this company.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"11989"}}