Visual Function at High Altitude in Nepal

Introduction: Assessment of visual function is important for diagnosing ocular diseases. In the present study we are assessing different components functions like acuity, color vision, contrast sensitivity and stereoacuity at high altitude in Nepal. Methods: A cross- sectional quantitative was conducted Bargaun village an 3330 meters Humla district Western Detailed eye examination carried out participants consenting who were from Limatang villages Humla. Visual sensitivity, oxygen saturation measured. Convenience sampling done. Data entered excel, converted to a comma separated values format supplied regression analysis Python 3. T-tests done linear model fitted data determine relationship between independent dependent variables obtain coefficients relationship. Results: One hundred sixty four completed study. Among them, 60.37% 50 years age below. Oxygen 91 - 100% 64.63%, 81 90% 33.53% 70-80% 1.83% participants. Maximum number had acuity 0.48-1 (6/18-6/6). Contrast 10% 4.88%, 5% 23.17%, 2.5% 40.24% 1.25% 31.71%. Stereoacuity < 30 seconds arc 78.5%, 30-60 12.80% 9% decreased stereoacuity. Color vision 4.88%. Increase associated with decrease saturation, poorer (p value = 0.00). better which statistically significant Conclusions: reduced 35%, 2.44%, 28.05%, abnormal 4.88% residing