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