Causative Agent

Conjunctivitis It is caused by virus and bacteria, it is also caused by allergy. Glaucoma narrow or blocked angle of anterior chamber. Corneal Ulcer Bacteria, virus, fungus. Iritis Endogenous & exogenous causes. Cataract Due to old age, trauma, genetic, nutritional, UV-rays. Refractive Errors Due to small or large eye ball and abnormal curvature of cornea. Trachoma Chlamydia organisms. Retinopathy Affects the retina due to diabetes and hypertension. Squint Refractive error/nerve palsy. Night Blindness Deficiency of vitamin A/retinitis pigmentosa. Corneal Opacity Injuries to cornea, vitamin A deficiency.