This cross-sectional case series was aimed to investigate effect of glaucoma on contrast sensitivity and to assess the relationship between contrast sensitivity and visual field loss in patients of primary open angle glaucoma. A total of 46 eyes were studied of 24 patients out of which male patients were 67% and female were 37%. The Pelli- Robson contrast sensitivity score correlated more strongly with the MD of the visual fields(r=-0.615, P