Question

Name the part of an eye that contains photoreceptors.

Answer 1

Retina:

The part of an eye that contains photoreceptors is Retina. Below are some of the important facts that support it: -

1. The photoreceptors (light-sensing cells) and the veins that supply them are located in the retina. The most sensitive area of the retina is the macula, a tiny area with many tightly packed photoreceptors (called cones). A nerve fibre connects each photoreceptor.
2. The optic nerve is made up of a bundle of photoreceptor nerve fibres. At the rear of the eye is the optic circle or first section of the optic nerve. The image is converted into electrical signals by the photoreceptors in the retina, which the optic nerve then sends to the brain.
3. The two fundamental types of photoreceptors are cones and poles. Cones can also provide vision with a sharp, point-by-point focus and with shade.
4. Different types of life forms have photoreceptor proteins, which are light-sensitive proteins that recognize and react to light.
5. Examples include phytochrome in plants, bacteriorhodopsin and bacteriophytochromes in some microorganisms, and rhodopsin in the photoreceptor cells of the vertebrate retina.