Mohammad Idris, Farid Khan, Hasan Yaqoob, Naseer Ahmad, Sadia Ayaz.
Demographic Features and Frequency of Astigmatism in Patients with Primary Pterygium (A study with a different angle).
Ophthalmol Update Jan ;12(4):302-5.

Objective: To determine the demographic features and frequency of astigmatism in patients with primary Pterygium. Introduction: Pterygium is a mixed soft tissue tumor that is strongly associated with non-ionizing ultraviolet radiation. Pterygium is a common ocular surface disease characterized by fibro vascular invasion of the cornea and is sight-threatening due to astigmatism, tear film disturbance, or occlusion of the visual axis. Study design: descriptive case series Methodology: This study was conducted at OPD, Eye Department, Lady Reading Hospital, Peshawar , from 4th April 2009 to 4th April 2010. Patients were examined after detailed history and important findings noted. Non probability purposive sampling technique was used. Results: A total of 142 patients of primary Pterygium were included in the study. There were 88 (61.97%) were males and 54(38.03%) were females. Male to female ratio was 1.63:1. Average age of the patients was 49.09 years+15.99SD with range 20-78 years. The astigmatism in primary Pterygium was observed in 36(25.35%) while in 106(74.65%) patients show no astigmatism. Conclusion: pterygium is responsible for inducing astigmatism and successful pterygium surgery reduces the pterygiuminduced refractive astigmatism and improves the visual acuity.

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