Condition
Night Blindness (Nyctalopia): Causes and Management
Night blindness (nyctalopia) is difficulty seeing in dim light or at night. While some cases are inherited, most are caused by conditions like vitamin A deficiency, cataracts, glaucoma, or retinitis pigmentosa. It is often a symptom of an underlying eye problem rather than a standalone disease.
Video Overview
Night Blindness (Nyctalopia): Causes and Management
Symptoms
Difficulty driving at night due to poor visibility
Slow adaptation when moving from bright to dark environments
Difficulty seeing stars or reading in low light
Bumping into things or tripping in dim conditions
Halos or glare around lights at night
Tunnel vision alongside night vision loss (retinitis pigmentosa)
Causes
Vitamin A deficiency (most common global cause)
Cataracts blocking light from reaching the retina
Glaucoma reducing rod photoreceptor function
Retinitis pigmentosa (hereditary retinal degeneration)
Myopia (nearsightedness) in uncorrected high prescriptions
Zinc deficiency (zinc is needed to produce visual pigment)
Treatments
Vitamin A supplementation for deficiency-related cases
Cataract removal if cataracts are the cause
Glaucoma treatment to reduce optic nerve damage
Corrective lenses for myopia-related night vision issues
Anti-reflective coatings on glasses for night driving
Nutritional support: zinc, vitamin E, omega-3 fatty acids
Low vision aids and special lighting at home
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