Question

Define the following:-
1.cornea
2.Iris
3.Pupil
4.Blind spot

Answer 1

Answer:

Explanation:

Cornea: It is the bulging out part of eye where maximum refraction of light takes place.

Iris: It is responsible for regulating the amount of light entering the eyes by changing the size of the pupil during day or night.

The colored part of the eye which helps regulate the amount of light entering the eye. When there is bright light, the iris closes the pupil to let in less light. And when there is low light, the iris opens up the pupil to let in more light. Focuses light rays onto the retina. called pupil

Blind spot, small portion of the visual field of each eye that corresponds to the position of the optic disk (also known as the optic nerve head) within the retina. There are no photoreceptors (i.e., rods or cones) in the optic disk, and, therefore, there is no image detection in this area.

Answer 2

Answer:

cornea is the transparent circular portion of the eyes.

iris the coloured part of the eyes which help regulate the amount of light entering the eyes.

pupil are the black centre of the eyes.