Night blindness

An impaired scotopic vision characterized by reduced visual capacity in dim illumination or at night, typically resulting from retinal rod dysfunction or defective dark adaptation.

Causes

• Vitamin A deficiency

• Retinitis pigmentosa

• Cataracts

• Severe myopia

• Keratoconus

• Corneal opacities

• Glaucoma affecting retinal signal transmission

• Diabetic retinopathy

• Iatrogenic retinal injury following ocular procedures

• Congenital stationary night blindness

• Drug-related retinal toxicity