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Variables analyzed were age, gender, preoperative visual acuity, axial length, laterality of eyes, operative duration, and the direction and degree of cyclotorsion. The mean cyclotorsion of 107 eyes of 93 cataract patients was 0.98\u2009\u00b1\u20094.85 degrees (median, 1 degree; range, -11 to 12 degrees), and the median absolute value was 4 degrees (mean, 4.05\u2009\u00b1\u20092.82 degrees; range, 0 to 12 degrees). Cyclotorsion was \u22653 degrees in 68 (63.6%) eyes. Excyclotorsion occurred more frequently than incyclotorsion (50.5% vs. 43.0%). There was no cyclotorsion in seven (6.5%). Multiple regression analysis showed that gender was a significant predictive factor for the absolute value of cyclotorsion (\u03b2\u2009=\u20091.06, <jats:italic>P<\/jats:italic>\u2009=\u20090.041); however, the other variables had no effect on cyclotorsion. The absolute value of cyclotorsion was significantly larger in female than in male patients [median, 4 degrees and 3 degrees, respectively; mean, 4.66\u2009\u00b1\u20093.02 degrees and 3.44\u2009\u00b1\u20092.52 degrees, respectively (<jats:italic>P<\/jats:italic>\u2009=\u20090.039)]. In conclusion, cataract patients had significant posture-related ocular cyclotorsion. The amount of cyclotorsion was larger for female than male patients.<\/jats:p>","DOI":"10.1038\/s41598-020-59118-9","type":"journal-article","created":{"date-parts":[[2020,2,7]],"date-time":"2020-02-07T11:03:42Z","timestamp":1581073422000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Posture-related ocular cyclotorsion during cataract surgery with an ocular registration system"],"prefix":"10.1038","volume":"10","author":[{"given":"Ryo","family":"Terauchi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Horiguchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoichiro","family":"Ogawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takuya","family":"Shiba","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroshi","family":"Tsuneoka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tadashi","family":"Nakano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,2,7]]},"reference":[{"key":"59118_CR1","doi-asserted-by":"crossref","first-page":"615","DOI":"10.3928\/1081-597X-19941101-05","volume":"10","author":"EM Smith Jr.","year":"1994","unstructured":"Smith, E. 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