draw a labelled sketch of the human eye Explain the function the following parts of the eye
Answers
Cornea: At the front of the eye is a clear, transparent layer called the cornea.
Iris: Behind the cornea is the iris, the colored part of the eye. The iris adjusts the amount of light entering the eye by opening the pupil wider in dim light and narrower in bright light.
Pupil: In the middle of the iris is a hole called the pupil.
Lens:Behind the iris is a convex lens made of a tough gelatinous material.
Aqueous humour:The area between the cornea and the lens contains a transparent liquid called the apueous humour.
Vitreous Humour: The area between the lens and the retina contains a transparent jelly-like substance called vitreous humour.
Retina: It is the area where the image is formed.
Blind Spot: The blind spot is an area on the retina that does not have any nerve cells. Therefore, the image that falls on this region will not be seen.
Optic Nerve: When light falls on the retina, the nerve cells are stimulated and transmit the impression to the brain by means of the optic nerve.
Ciliary Muscles: They hold the lens in place. They contract and relax to alter the thickness of the lens, enabling the eye to see far and near objects equally clearly.
Explanation:
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