An overview of corneal topography and visual outcomes after different pterygium surgeries: An interventional case series study

Abstract

Introduction: To investigate corneal topography and visual outcomes after different pterygium surgical techniques using Pentacam Scheimpflug device Materials and Methods: Ninety-eight unilateral primary nasal pterygium patients underwent surgery under topical anesthesia with either conjunctival autograft (group 1) or anchored conjunctival rotational flap (group 2), both using fibrin tissue adhesive. Baseline and three-month post-operative bestcorrected visual acuity (BCVA) and anterior corneal astigmatism (ACA), flattest keratometry (Kf), steepest keratometry (Ks) and posterior corneal astigmatism (PCA) were investigated. Results: In groups 1 and 2, the mean logMAR BCVA increased from 0.119±0.113 to 0.082±0.086 and 0.169±0.128 to 0.120±0.121, respectively. There were no significant differences between the two groups in pre- and post-operative ACA, PCA, Kf and Ks. Intra-group analysis revealed significant differences in both groups: ACA, with a greater difference in group 1 (2.072), and Kf, with a slightly greater difference in group 2 (1.910). Intra-group analysis revealed no statistically significant PCA changes for either group. Conclusions: Significantly improved anterior corneal topographic changes were found to be highly related to conjunctival autografting. Conjunctival rotational flap, on the other hand, was associated with significantly greater posterior corneal topographic changes.