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The main parts of the human eye and their functions are as follows:
1. Cornea: The clear, dome-shaped outer layer that helps to focus light into the eye.
2. Iris: The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.
3. Pupil: The black circular opening in the center of the iris that allows light to enter the eye.
4. Lens: A transparent, flexible structure that helps to focus light onto the retina at the back of the eye.
5. Retina: The light-sensitive layer of tissue at the back of the eye that contains cells called photoreceptors, which convert light into electrical signals that are sent to the brain.
6. Optic nerve: The nerve that carries visual information from the retina to the brain.
7. Vitreous humor: A clear, gel-like substance that fills the space between the lens and the retina, helping to maintain the shape of the eye.
8. Sclera: The tough, white outer layer of the eye that helps to protect and support the eye.
9. Conjunctiva: The thin, transparent membrane that covers the white part of the eye and the inside of the eyelids.
10. Ciliary muscles: Muscles that control the shape of the lens, allowing the eye to focus on objects at different distances.
1. Cornea: The clear, dome-shaped outer layer that helps to focus light into the eye.
2. Iris: The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.
3. Pupil: The black circular opening in the center of the iris that allows light to enter the eye.
4. Lens: A transparent, flexible structure that helps to focus light onto the retina at the back of the eye.
5. Retina: The light-sensitive layer of tissue at the back of the eye that contains cells called photoreceptors, which convert light into electrical signals that are sent to the brain.
6. Optic nerve: The nerve that carries visual information from the retina to the brain.
7. Vitreous humor: A clear, gel-like substance that fills the space between the lens and the retina, helping to maintain the shape of the eye.
8. Sclera: The tough, white outer layer of the eye that helps to protect and support the eye.
9. Conjunctiva: The thin, transparent membrane that covers the white part of the eye and the inside of the eyelids.
10. Ciliary muscles: Muscles that control the shape of the lens, allowing the eye to focus on objects at different distances.
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