Comparison Of Biometry Measurements And Intraocular Lens Power Prediction Between Two Swept-Source Based Oct Biometers
Published 2023 - 41st Congress of the ESCRS
Reference: FP05.07 | Type: Free paper | DOI: 10.82333/z8kn-yf77
Authors: Nir Sorkin* 1 , Tal Zadok 2 , Graham Barrett 3 , Otzem Chasid 4 , Adi Abulafia 5
1Ophthalmology,Tel Aviv Medical Center and Sackler Faculty of Medicine, Tel Aviv University,Tel Aviv,Israel, 2Azrieli Faculty of Medicine, Bar-Ilan University,Safed,Israel, 3Sir Charles Gairdner Hospital, University of Western Australia,Perth,Australia;Lions Eye Institute, affiliated to the University of Western Australia,Perth,Australia, 4Azrieli Faculty of Medicine, Bar-Ilan University,Safed,Israel;Ophthalmology,Ziv Medical Center,Safed,Israel, 5Ophthalmology,Shaare Zedek Medical Center and the Hebrew University-Hadassah Medical School,Jerusalem,Israel
Purpose
To evaluate the agreement in biometry measurements and intraocular lens (IOL) power prediction between the Eyestar 900 (Haag-Streit Diagnostics, Koeniz, Switzerland) and the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany).
Setting
Institutional
Methods
A Retrospective comparative study including 402 eyes of 402 consecutive subjects evaluated prior to cataract surgery using the Eyestar 900 and the IOLMaster 700 on the same visit. Measurements: Axial length, anterior and posterior keratometry, anterior chamber depth, corneal diameter (CD), central corneal thickness and lens thickness recorded by both devices. Main Outcome Measures: Agreement in measurements and in IOL power calculations using Barrett Universal II (BUII) formula with either predicted or measured posterior keratometry.
Results
Mean differences in measured variables were small, albeit slightly larger for posterior flat and steep keratometry (0.43D and 0.42D, respectively). Measurement correlation and agreement were good for all variables, albeit slightly lower for CD measurements. Consistent bias was seen in measurements of posterior flat and steep keratometry. Good agreement was found in anterior and posterior astigmatism measurements. Good IOL power calculation agreement was found using either predicted posterior keratometry (95% LOA of -0.40 to +0.30D) or measured posterior keratometry (95% LOA of -0.45 to +0.40D). Agreement was within ±0.5D in 394 eyes (98.0%) using predicted posterior keratometry, and in 386 eyes (96.0%) using measured posterior keratometry.
Conclusions
The Eyestar 900 and the IOLMaster 700 show strong agreement in biometry measurements and IOL power prediction by the BUII formula using either standard or total corneal keratometry and can be used interchangeably.