Syeda Rushda Zaidi, Samia Iqbal, Syed Hamza Ali, Muhammad Jamshed.
Effect of Stress on Visual Functions.
Pak J Ophthalmol Jan ;33(4):240-5.

Purpose: To find out the effect of stress on visual function. Study Design: Cross-sectional study. Duration and Place of Study: Department of Psychology, Fountain house, Lahore and Department of Optometry and Vision Sciences, The University of Lahore from February to May 2017. Material and Methods: Visual acuity screening, glare sensitivity, contrast sensitivity, color vision and visual field were performed on a sample of 70 patients having stress using Ishihara test, Snellen chart, Pelli-Robson contrast sensitivity test, Snellen chart for Glare sensitivity and confrontation method respectively. Screening tests were carried to measure visual functions in patients with diagnosed stress disorders. Patients diagnosed with stress within the age range of 18 ? 40 years were taken into consideration. Data was analyzed using SPSS version 20. Results: Out of 70 patients having history of stress 47.1% patients showed defects in contrast sensitivity and 42.85% patients showed decrease in visual acuity. There were 35.7% subjects having decrease in glare sensitivity while 99% of patients exhibited no defect in visual field and color vision. The study conducted was unbiased to age, occupation and gender. Conclusion: Stress affects the visual functions. Visual acuity, glare sensitivity and contrast sensitivity are affected by stress in majority cases. However, stress patients have normal color vision and visual field.

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