Which of the following is not a cause of blindness?

Correct option is C

Sol. Conjunctivitis (commonly known as pink eye) is an eye infection that causes redness, swelling, and irritation but does not lead to permanent blindness. It is usually caused by bacteria, viruses, or allergens, and it is treatable with medications or natural recovery.
Explanation of each option:
· (a) Refractive errors – Incorrect. Severe uncorrected refractive errors (such as myopia, hyperopia, and astigmatism) can lead to significant visual impairment or even blindness if not managed properly with corrective lenses or surgery.
· (b) Cataract – Incorrect. A cataract is a clouding of the eye’s lens that leads to progressive vision loss and, if left untreated, can result in blindness. Cataract surgery is a common treatment to restore vision.
· (c) Conjunctivitis – Correct answer. Conjunctivitis causes temporary discomfort but does not cause permanent blindness. It is typically resolved with appropriate medical treatment.
· (d) Age-related macular degeneration (AMD) – Incorrect. AMD is a progressive eye disease that affects central vision and is one of the leading causes of blindness in older adults. It occurs due to damage to the macula, the central part of the retina.