Saratov JOURNAL of Medical and Scientific Research

formula for calculating IOL

Analysis of six formulas for intraocular lens optic power calculation precision in eyes with axial length of 20-22 mm

Year: 2020, volume 16 Issue: №2 Pages: 638-642
Heading: Ophtalmology Article type: Original article
Authors: Pershin K.B., Pashinova N.F., Likh I.A., Tsygankov A.Yu.
Organization: Ophthalmological clinics «Eximer»

The purpose of the study was to conduct comparative analysis of the accuracy of IOL optical power calculation for eyes with an axial length of 20-22 mm and 22-24 mm. Material and Methods. 147 eyes of 104 patients were included in the study. The study group (I) included 56 patients (81 eyes) with short eyes (average axial eye length 21.17±0.56 (20.02-21.98 mm). Comparison group (II) consisted of 48 patients (66 eyes) with a normal axial length of 22.75±0.46 (22.0-23.77) mm. The IOL optical power was calculated using the SRK/T formula, and the retrospective comparison was made using the Hoffer-Q, Holladay 2, Olsen, Haigis and Barrett Universal I formulas. Results. Group I was characterized by statistically insignificant (p<0.05) differences in the average estimation error for Holladay 2, Hoffer-Q, SRK/T, Olsen and Barrett Universal II formulas (0.19±0.14, 0.23±0.08, 0.15±0.09, 0.21±0.13 and 0.17±0.21 D respectively). When using the Haigis formula, the smallest average estimation error was obtained (0.11±0.02), the differences are significant at the trend level (0.05

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