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Corneal biomechanics in pterygium

Session Details

Session Title: Corneal biomechanics

Session Date/Time: Tuesday 08/10/2013 | 08:00-10:30

Paper Time: 10:24

Venue: Elicium 1 (First Floor)

First Author: : S.Goel INDIA

Co Author(s): :    M. Vanathi   V. Kumar   R. Hirawat        

Abstract Details


To compare the biomechanical properties of the cornea between eyes with unilateral primary pterygium with fellow eyes of same patients.


Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India


Seventy individuals with unilateral primary pterygia were enrolled in this prospective, cross-sectional comparative study. Corneal hysteresis (CH), corneal resistance factor (CRF), corneal compensated intraocular pressure, and Goldmann-related intraocular pressure were measured using the Reichert Ocular Response Analyzer (ORA) for both, eyes with pterygium and fellow eyes taken as control. Both groups were compared using student t-test for independent variables.


Mean age of the study population was 43.4years +/- 11.5 (SD) and a male: female ratio of 2:1. Waveform scores for all measurements using Reichert’s ORA were comparable and reliable with a mean value of 6.45 (S.D. = 2.07) in the pterygium group and 6.68 (S.D=1.75) in normal control group. Corneal biomechanics, in terms of IOPg (14.1 vs. 14.2 mm Hg, p=0.918), IOPcc (15.9 vs 15.8, p=0.918), CH (9.42 vs. 9.61, p=0.607) and CRF (9.13 vs. 9.34, p=0.593) was also comparable between the pterygium vs control group.


Corneal biomechanical parameters in eyes with pterygium, as measured by ocular response analyzer, are comparable with normal eyes.

Financial Interest:


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