Elaine M Tran1, Kevin S Tang1, Allison J Chen1, Michael L Chen1, David R Rivera1, Jorge J Rivera1, Paul B Greenberg1. 1. and are Medical Students; and are Clinical Assistant Professors of Surgery (Ophthalmology); and is a Professor of Surgery (Ophthalmology); all at the Warren Alpert Medical School of Brown University in Providence, Rhode Island. is an Ophthalmology Resident at the Shiley Eye Institute, University of California San Diego Health in La Jolla. is a Student at Harvard University in Cambridge, Massachusetts. David Rivera and Jorge Rivera are Staff Ophthalmologists, and Paul Greenberg is Chief of Ophthalmology; all at the Providence Veterans Affairs Medical Center in Rhode Island.
Abstract
Background: Refractive outcomes for cataract surgery with toric intraocular lenses (IOLs) are not well described in a teaching hospital setting. This study investigated the refractive outcomes of cataract surgery with toric IOLs at an academic-affiliated Veterans Affairs Medical Center (VAMC) and compared the accuracy of 2 biometric formulae for toric IOL power calculation. Methods: A retrospective chart review of patients who received cataract surgery with toric IOLs from November 2013 to May 2018 was conducted. The Holladay 2 and Barrett toric IOL formulae were used to predict the postoperative refraction for each cataract surgery. The main outcome measures were best-corrected visual acuity (BCVA) and the difference in cylinder between the preoperative and postoperative manifest refractions. The accuracy of each biometric formula was also assessed using 2-tailed t tests of the mean absolute error, and subgroup analyses were conducted for short, medium, and long eyes. Results: Of 325 charts reviewed, 283 patients met the inclusion criteria; 87% (248/283) of these surgeries were performed by resident surgeons. The median postoperative BCVA was 20/20, and 92% of patients had a postoperative BCVA of 20/25 or better. There was no statistically significant difference in mean absolute error between the 2 formulae for the entire axial length range (P = .21), as well as the short (P = .94), medium (P = .49), and long axial length (P = .08) groups. Conclusions: To our knowledge, this is the largest study that compared the performance of the Barrett toric and Holladay 2 formulae and the first that made the comparison in a teaching hospital setting. This study suggests that the 2 formulae have similar refractive outcomes across all axial lengths.
Background: Refractive outcomes for cataract surgery with toric intraocular lenses (IOLs) are not well described in a teaching hospital setting. This study investigated the refractive outcomes of cataract surgery with toric IOLs at an academic-affiliated Veterans Affairs Medical Center (VAMC) and compared the accuracy of 2 biometric formulae for toric IOL power calculation. Methods: A retrospective chart review of patients who received cataract surgery with toric IOLs from November 2013 to May 2018 was conducted. The Holladay 2 and Barrett toric IOL formulae were used to predict the postoperative refraction for each cataract surgery. The main outcome measures were best-corrected visual acuity (BCVA) and the difference in cylinder between the preoperative and postoperative manifest refractions. The accuracy of each biometric formula was also assessed using 2-tailed t tests of the mean absolute error, and subgroup analyses were conducted for short, medium, and long eyes. Results: Of 325 charts reviewed, 283 patients met the inclusion criteria; 87% (248/283) of these surgeries were performed by resident surgeons. The median postoperative BCVA was 20/20, and 92% of patients had a postoperative BCVA of 20/25 or better. There was no statistically significant difference in mean absolute error between the 2 formulae for the entire axial length range (P = .21), as well as the short (P = .94), medium (P = .49), and long axial length (P = .08) groups. Conclusions: To our knowledge, this is the largest study that compared the performance of the Barrett toric and Holladay 2 formulae and the first that made the comparison in a teaching hospital setting. This study suggests that the 2 formulae have similar refractive outcomes across all axial lengths.
Authors: Petros Aristodemou; Nathaniel E Knox Cartwright; John M Sparrow; Robert L Johnston Journal: J Cataract Refract Surg Date: 2011-01 Impact factor: 3.351
Authors: Carmen Canovas; Aixa Alarcon; Robert Rosén; Sanjeev Kasthurirangan; Joseph J K Ma; Douglas D Koch; Patricia Piers Journal: J Cataract Refract Surg Date: 2018-03-07 Impact factor: 3.351