Repository of Research and Investigative Information

Repository of Research and Investigative Information

Dezful University of Medical Sciences

Effect of anterior chamber depth on the choice of intraocular lens calculation formula in patients with normal axial length

(2014) Effect of anterior chamber depth on the choice of intraocular lens calculation formula in patients with normal axial length. Middle East African journal of ophthalmology. pp. 307-311. ISSN 09749233 (ISSN)

Full text not available from this repository.

Official URL: https://www2.scopus.com/inward/record.uri?eid=2-s2...

Abstract

Purpose: To compare the accuracy of Sanders-Retzlaff-Kraff II (SRK II) and 3 rd and 4 th generation intraocular lens (IOL) formulas and to compare the effect of different anterior chamber depths among the IOL formulas in cataract patients with normal axial length (AL; 22.0-24.5 millimeters, mm). Materials and Methods: A retrospective chart review was performed of patients with normal AL who underwent cataract surgery. The SRK II and 3 rd generation IOL formulas (Hoffer Q, SRK T, Holladay 1) were compared to the 4 th generation Haigis formula. For analysis, preoperative anterior chamber depth (ACD) was divided into three subgroups: ≤3, 3-3.5, and ≥ 3.5 mm. The mean error (ME) and mean absolute error (MAE) of each formula was compared for each subgroup against the total. The difference between the ME and MAE of the formulas were compared for each ACD subgroup. P &lt; 0.05 was considered statistically significant. Results: The study sample was comprised of 309 eyes. The MAE were 0.56 D, 0.52 D, 0.51 D, 0.50 D, and 0.50 D with Haigis, Hoffer Q, SRK T, Holladay 1, and SRK II formulas, respectively. The Haigis formula was a significantly weaker predictor than the SRK T (P < 0.001) and Holladay 1 (P = 0.035) formulas. The ME with Haigis formula was -0.23 D which changed to -0.06 D with ACD ≥ 3.5 mm (P = 0.002). The ME was -0.24 D with SRK II and changed to -0.09D with ACD ≤ 3 mm (P = 0.004). There was no statistically significant difference between Hoffer Q, SRK T, and Holladay formulas 1 in ACD subgroups (P > 0.05, all comparisons). Conclusion: The SRK II formula can predict refraction in patients with normal AL and ACD less than 3 mm with less error and is preferred over other formulas. The Haigis formula is the preferred choice in patients with a normal AL and ACD longer than 3.5 mm. The prediction accuracy of Hoffer Q, SRK T, and Holladay 1 is comparable in normal AL.

Item Type: Article
Keywords: Anterior Chamber Depth Intraocular Lens Formula Normal Axial Length aged anterior eye chamber depth Article calculation controlled study emmetropia eye axis length eye refraction Haigis formula Hoffer Q formula Holladay 1 formula human intermethod comparison lens implant major clinical study measurement accuracy measurement error prediction retrospective study Sanders Retzlaff Kraff II anatomy and histology anterior eye chamber biometry cataract extraction comparative study female lens implantation male middle aged optics physiology procedures Anterior Chamber Axial Length, Eye Humans Lens Implantation, Intraocular Lenses, Intraocular Optics and Photonics Refraction, Ocular Retrospective Studies
Page Range: pp. 307-311
Journal or Publication Title: Middle East African journal of ophthalmology
Journal Index: Scopus
Volume: 21
Number: 4
Identification Number: https://doi.org/10.4103/0974-9233.142266
ISSN: 09749233 (ISSN)
Depositing User: مهندس مهدی شریفی
URI: http://eprints.dums.ac.ir/id/eprint/494

Actions (login required)

View Item View Item