Comparative Study of Prevalence of Cataract at High Altitude and Kathmandu Valley

Abstract

Abstract Background: Cataract is the leading cause of avoidable blindness in the world. Many etiological and risk factors for age related cataract has been documented. The present study is conducted to compare the prevalence of cataract at high altitude and Kathmandu valley.Many etiological and risk factors for age related cataract has been documented. Methods: A cross sectional comparative study was conducted at Jomsom, Kagbeni, Jharkot and Muktinath of Mustang district and Balaju and Jawalakhel of Kathmandu valley of Nepal in 2009 to 2011 . There were 222 participants at Mustang and186 participants at Kathmandu. The prevalence of cataract was studied among the Tibetans and Thakali population at Mustang and Tibetans at Jawalakhel and Thakali population at Balaju of Kathmandu valley. Results: Prevalence of cataract at high altitude was 31.5% and 10.2% at Kathmandu valley. The prevalence of cataract is 4.05 times more at high altitude as compared to Kathmandu valley (p value < 0.001). Conclusions: The prevalence of cataract was significantly high at high altitude as compared to lower altitude. Keywords: Altitude; cataract; prevalence; psedophakia.