Question

Given below is the structure of a human eye. Read the information below the diagram and fill in the blanks:

Eyes are the sense organs located in deep sockets on the front side of the head. Eyes can receive the light stimulus and hence considered as photoreceptors. Eyes are protected with eyelids, eyebrows and tear glands, etc. Eyes are visionary in function.

The wall of the eyeball is composed of three concentric layers. The middle layer of the eyeball is (a) ______ richly supplied with blood vessels whereas the innermost layer is (b) ______ which contains two types of sensory cells. (c) ______ is the extension of the middle layer of the eyeball which regulates the size of the (d) ______. The image formed on the yellow spot of the eye is the (e) ______.

Answer 1

The wall of the eyeball is composed of three concentric layers. The middle layer of the eyeball is choroid richly supplied with blood vessels whereas the innermost layer is retina which contains two types of sensory cells. Iris is the extension of the middle layer of the eyeball which regulates the size of the pupil. The image formed on the yellow spot of the eye is the real and inverted image.