Accuracy of intraocular lens formulas using total keratometry in eyes with previous myopic laser refractive surgery release_trhd66exljb3xavbl2zb7ccgvm

by Tun Kuan Yeo, Wee Jin Heng, Don Pek, John Wong, Han Bor Fam

Published in Eye (London. 1987) by Springer Science and Business Media LLC.

2020  

Abstract

This comparative study aimed to determine if total keratometry (TK) from IOLMaster 700 could be applied to conventional formulas to perform IOL power calculation in eyes with previous myopic laser refractive surgery, and to evaluate their accuracy with known post-laser refractive surgery formulas. Sixty-four eyes of 49 patients with previous myopic laser refractive surgery were evaluated 1 month after cataract surgery. A comparison of the prediction error was made between no clinical history post-laser refractive surgery formulas (Barrett True-K, Haigis-L, Shammas-PL) and conventional formulas (EVO, Haigis, Hoffer Q, Holladay I, and SRK/T) using TK values obtained with the optical biometer IOLMaster 700 (Carl Zeiss Meditec), as well as Barrett True-K with TK. The mean prediction error was statistically different from zero for Barrett True-K, Barrett True-K with TK, Haigis-L, Shammas-PL, and Holladay I with TK. The mean absolute error (MAE) was 0.424, 0.671, 0.638, 0.439, 0.408, 0.424, 0.479, 0.647, and 0.524, and median absolute error (MedAE) was 0.388, 0.586, 0.605, 0.298, 0.294, 0.324, 0.333, 0.438, and 0.377 for Barrett True-K, Haigis-L, Shammas-PL, Barrett True-K TK, EVO with TK, Haigis with TK, Hoffer Q with TK, Holladay I with TK, and SRK/T with TK, respectively. EVO TK followed by Barrett True-K TK and Haigis TK achieved the highest percentages of patients with absolute prediction error within 0.50 and 1.00 D (68.75%, 92.19%, and 64.06%, 92.19%, respectively) CONCLUSIONS: Formulas combined with TK achieve similar or better results compared to existing no-history post-myopic laser refractive surgery formulas.
In text/plain format

Archived Files and Locations

application/pdf  965.8 kB
file_gkoqkzpmpzdnjmggnm4wazsuxm
www.nature.com (publisher)
web.archive.org (webarchive)
Read Archived PDF
Preserved and Accessible
Type  article-journal
Stage   published
Date   2020-08-31
Language   en ?
Container Metadata
Not in DOAJ
In Keepers Registry
ISSN-L:  0950-222X
Work Entity
access all versions, variants, and formats of this works (eg, pre-prints)
Catalog Record
Revision: 6ecd6b6d-4cc7-4d6a-87ed-1e3ed2ac77e2
API URL: JSON