Question

Choose the correct statement w.r.t. human eye.

• A. At the posterior pole of eye medial to blind spot, there is yellowish pigmented spot called fovea
• B. Photoreceptor cells remains polarised in dark and become depolarised on exposure to visible spectrum of light
• C. Light induces dissociation of the retinal from opsin resulting in change in the structure of opsin
• D. Twilight vision is function of cones present only in the region of fovea

Answer 1

The correct option is C Light induces dissociation of the retinal from opsin resulting in change in the structure of opsin

Macula lutea is present lateral to blind spot and its central pit is called fovea. Photoreceptor cells remain depolarized in dark and become hyperpolarized in light. Twilight vision is function of cones present in outer layer of retina in all parts except blind spot. Hence, option c is the correct answer.