Longitudinal Changes In Ocular Biometry In Cataract Patients And Their Effects On Intraocular Lens Calculation
Published 2024 - 42nd Congress of the ESCRS
Reference: PP05.13 | Type: Free paper | DOI: 10.82333/mdnb-td02
Authors: Young In Yun* 1 , Joo Youn Oh 1 , Hyuk Jin Choi 2 , Mee Kum Kim 1 , Chang Ho Yoon 1
1Department of Ophthalmology,Seoul National University College of Medicine,Seoul,Korea, Republic Of;Department of Ophthalmology,Seoul National University Hospital,Seoul,Korea, Republic Of;Laboratory of Ocular Regenerative Medicine and Immunology,Biomedical Research Institute, Seoul National University Hospital,Seoul,Korea, Republic Of, 2Department of Ophthalmology,Seoul National University College of Medicine,Seoul,Korea, Republic Of;Department of Ophthalmology,Seoul National University Hospital,Seoul,Korea, Republic Of;Laboratory of Ocular Regenerative Medicine and Immunology,Biomedical Research Institute, Seoul National University Hospital,Seoul,Korea, Republic Of;Department of Ophthalmology,Seoul National University Hospital Healthcare System Gangnam Center,Seoul,Korea, Republic Of
Purpose
To investigate the changes in ocular biometry over time and their impact on the calculation of intraocular lens (IOL) power in adult Korean patients with cataracts.
Setting
This is a retrospective study of ocular biometry data collected using the IOLMaster 700 at Seoul National University Hospital (Seoul, Korea) between November 1, 2019 and March 31, 2023.
Methods
We examined 252 eyes of 217 patients who underwent two consecutive ocular biometry measurements spaced one year apart. All measurements were performed using the IOLMaster 700 at a tertiary hospital between November 2019 and March 2023. Longitudinal changes in ocular biometric values were evaluated. Predicted refraction and predictive errors were then compared in 60 eyes that underwent cataract surgery using the SRK/T, Kane, Barrett Universal II, Cook K6, EVO, Hill-RBF, Hoffer QST, and Pearl DGS formulas.
Results
Ocular biometry measured at an average interval of 1.7 years showed that as age increased, axial length elongated (mean 0.04 ± 0.12 mm, p < 0.05), and anterior and total keratometry of flat axes decreased (–0.04 ± 0.27 D, p < 0.05 and –0.05 ± 0.31 D, p < 0.05, respectively), resulting in a decrease in the anterior and total corneal astigmatism (0.06 ± 0.31 D, p < 0.05 and 0.08 ± 0.36 D, p < 0.05, respectively). However, there was no significant difference in the predicted refraction using the IOL power calculation formulas between the two biometric measurements performed at an average interval of 1.7 years. Similarly, there was no significant difference in the predictive error of postoperative refraction between the two time points.
Conclusions
In this cohort of cataract patients who were observed for at least one year and an average of 1.7 years, changes in axial length and corneal curvature were observed with increasing age but did not significantly affect the results of IOL calculation or the actual refractive error. The results of IOLMaster 700 ocular biometry within one year before cataract surgery may be safely used for intraocular lens calculation.