Question

Which of the following is not a reason for blindness?

(a) Damage to the retina

(b) Low blood supply to the cornea

(c) Damage to the optic nerve

(d) Injury in the occipital lobe of the brain

I got this question during an internship interview.

This is a very interesting question from Artificial Organs in section Rehabilitation and Recovery of Clinical Science

Answer 1

Correct answer is (b) Low blood supply to the cornea

The explanation: Cornea does not receive blood supply at all thus it cannot be a reason for blindness. The cornea simply a covering of the lens and protects it. The focal length of the lens is changed by the ciliary muscles and these muscles receive blood supply. Even if the ciliary muscles stop receiving blood, it will result in conditions like myopia, hpyermetropia etc.