Barcelona 2015 Programme Registration Glaucoma Day 2015 Exhibition Virtual Exhibition Satellite Meetings Hotel Booking Star Alliance

Take a look inside the London 2014 Congress


Then register to join us
in Barcelona!

Repeatability of corneal astigmatism measurements

Search Abstracts by author or title
(results will display both Free Papers & Poster)

Session Details

Session Title: Special Cases II

Session Date/Time: Monday 07/09/2015 | 17:00-18:30

Paper Time: 17:06

Venue: Room 11

First Author: : A.Belkin ISRAEL

Co Author(s): :    A. Abulafia   A. Levy   A. Ohayon   D. Koch   L. Wang   E. Assia     

Abstract Details


To compare the repeatability of the astigmatism measurements taken by various devices.


Ein-Tal Eye Center, Tel Aviv, Israel


We performed two sets of corneal measurements on 28 right eyes of 28 healthy volunteers at an interval of five to ten days. All exams were done by a single experienced optometrist, and all measurements adhered to strict validation criteria. Inclusion criteria were age ≥ 18 years, no known ocular pathology, no contact lens wear, and no previous ocular surgery. Corneal measurements were performed using IOLMaster 500, Lenstar LS 900, NIDEK ARK-530A, Atlas topographer and Pentacam HR. Repeatability was evaluated by comparing the differences between the two measurements for the J0 and J45 vectors.


The lowest variances of the differences in measurements (J0 and J45) were seen with the Lenstar and the Pentacam, P=0.026. Using the Lenstar 78.6% of eyes had an absolute power difference of the measured corneal astigmatism which was smaller or equal to 0.25 Diopter, followed by the Pentacam (71.4%), the Nidek (60.7%), the IOLMaster (42.9%) and the Atlas (35.7%) devices.


The repeatability of corneal astigmatism measurements can vary among different devices. The implications of these findings should be considered for surgical planning and monitoring postoperative astigmatic outcomes.

Financial Interest:


Back to previous