Question

What is the function of Retina?
Please give in point.​

Answer 1

Answer:

Explanation:

• The inner coat of the eyeball is called the retina. it contains the actual light receptors , the rods and the cones, and thus retina functions in the same way as the film of a camera does.

• Retina contains three layers of cells from inside to outside - ganglion cells, bipolar cells and photoreceptor cells.
• There are two types of photoreceptor cells ,namely rods and cones. these cells contain the light sensitive proteins called the photopigments.
• The retina consists of pigment epithelium(nonvisual portion) and a neural epithelium(visual portion).
• Retina contains blind spot, yellow spot (macula lutea) and fovea.
• Fovea is the point were the visual acuity (resolution) is highest and the vision is sharpest as fovea contains only cones.
• Retina is main area were light coming from object is perceived and transformed into electrical signals which reaches the visual cortex of brain through optic nerve.
• Image formed on the retina is recognised based on earlier memory and experience.