Comparison of anterior corneal curvature and astigmatism parameters provided by three different devices

Session Details

Session Title: Anterior Segment Imaging

Session Date/Time: Monday 16/09/2019 | 14:00-16:00

Paper Time: 15:12

Venue: Free Paper Forum: Podium 4

First Author: : A.Molina-Martín SPAIN

Co Author(s): :    D. Piñero   M. Caballero   V. Camps   D. de Fez   H. Fukumitsu                 

Abstract Details

Purpose:

To compare the corneal curvature and astigmatism measurements provided by three different systems and to assess the interchangeability between them in healthy eyes.

Setting:

Department of Optics, Pharmacology and Anatomy, University of Alicante, Spain Department of Ophthalmology. Vithas Medimar International Hospital, Alicante, Spain

Methods:

A total of 28 healthy eyes of 28 patients (age, 15-53 years) were enrolled. A complete eye examination was performed in all cases including analysis of anterior corneal curvature and astigmatism with three devices: the Cassini system (i-Optics), the Scheimpflug-based system Pentacam (Oculus Optikgeräte), and the IOL Master 500 (Zeiss). Differences between devices were assessed by means of Wilcoxon Test. The Bland & Altman analysis was used to evaluate the agreement between devices.

Results:

Statistically significant differences were found in Mean k, Steep k, and Flat k between the three devices (p < 0.001). No significant differences between devices were found in Astigmatism (magnitude) and J0 power vector (p=0.054 and p=0.156, respectively). In contrast, statistically significant differences between devices were found for J45 (p=0.022). Bland-Altman plots showed clinically relevant differences between devices for all studied parameters.

Conclusions:

The three devices evaluated did not provide interchangeable measurements of anterior corneal curvature. These results should be considered when considering data for calculating intraocular lens power.

Financial Disclosure:

travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented