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Intraocular lens (IOL) calculation was performed using Barrett Universal II (UII), Haigis, and SRK\/T formulas. The refractive prediction error (PE) was calculated by subtracting the postoperative refraction from predicted refraction. The mean PE (MPE), mean absolute error (MAE), and percentages of eyes that had a PE of \u00b10.25, \u00b10.50, \u00b11.00, or \u00b12.00 diopters (D) were calculated and compared.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      No significant differences were observed in PE between the two groups. The Barrett UII formula revealed a lower AE in the CTR group than in the control group (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.015) and a lower AE than the other two formulas (p\u2009=\u20090.0000) in both groups. The Barrett UII formula achieved the highest percentage of eyes with a PE of \u00b10.25 D (66.67%).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The refractive outcomes were more accurate in eyes with CTR implantation than in those with routine phacoemulsification based on the Barrett UII formula. The Barrett UII formula was recommended as the appropriate formula when planning CTR implantation in high myopia.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s40001-024-01726-6","type":"journal-article","created":{"date-parts":[[2024,2,24]],"date-time":"2024-02-24T01:02:31Z","timestamp":1708736551000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Effect of capsular tension ring on the refractive outcomes of patients with extreme high axial myopia after phacoemulsification"],"prefix":"10.1186","volume":"29","author":[{"given":"Hui-Ying","family":"Zhao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing-Shang","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meng","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong-Jun","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiu-Hua","family":"Wan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,24]]},"reference":[{"key":"1726_CR1","doi-asserted-by":"publisher","DOI":"10.1111\/aos.13234","volume":"95","author":"P Vazquez-Ferreiro","year":"2017","unstructured":"Vazquez-Ferreiro P, Carrera-Hueso FJ, Fikri-Benbrahim N, Barreiro-Rodriguez L, Diaz-Rey M, Ram\u00f3n Barrios MA. 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