Study of Corneal Curvature with Pterygium Morphology in Tertiary Care Center in Central India

Abstract

Purpose: To evaluate the correlation between corneal astigmatism and pterygium morphology by anterior segment optical coherence tomography.

Methods: Patients diagnosed with unilateral pterygium were included in this prospective crosssectional study. A thorough history was taken and each patient underwent detailed ocular examination including demographic data, subjective refraction with best corrected visual acuity using a Snellen’s chart, anterior and posterior segment examination with slit lamp biomicroscopy, keratometric measurements using an autorefractometer. The vertical width and horizontal length of the pterygium was measured manually with the millimetric scale of the slit lamp biomicroscope.

Results: The study consisted of 45 patients with a mean age of 54.58 years. Mean Horizontal pterygium length, vertical width and percentage extension of pterygium was 2.71 mm, 4.56 mm, 50.22% respectively. Mean anterior corneal astigmatism was 2.11±1.69. Analysing the correlation separately, a statistically significant correlation was present between horizontal length and percentage extension and the anterior corneal astigmatism.

Conclusion: Anterior corneal astigmatism was higher in pterygium group as compared to the   contralateral eye without pterygium.