Question

A Draw a circle around the area of lowest acuity in this image. What is absent from this circled area? What is present in this circled area?

Answer 1

A).

5. A. Draw a circle around the area of lowest acuity in this image. Optic disk_ Central retinal artery and vein > Contains no rods Fovea and cones Macula: the- center of the visual field (b) View of the rear wall of the eye as seen through the pupil with an ophthalmoscope

B). Retina is the innermost nervous coat of eyeball, and it contains some special photo receptor structures called “rods and cones.” These rods and cones receive the light and send impulses to the optic nerve. The center of the visual field, fovea contains huge number of cones but it does not contain rods.

Optic disc or optic papilla is a pale disk situated near the centre of the eye ball (of the posterior wall), from which the optic nerve leaves the eye ball. It contains all the layers of retina, but it does not contain rods and cones. So, the optic disc is insensitive to light, hence it is also called as blind spot.

C). The circles area contains all the layers of retina.