1. Retinal blood vessel,
2. Choroid: Blood vessels within this layer supply the eye with essential nutrients,
3. Retina: This innermost layer of the eyeball contains nerve fibers and light-sensitive cells,
4. Optic disk : This area, where the optic nerve leaves the eye, lacks light-sensitive cells and is also known as the ‘blind spot’,
5. Optic nerve: Nerve impulses travel along the optic nerve from the retina to the brain,
6. Eye muscle: Six muscles surround the eye, allowing it to rotate in any direction,
7. Fovea: The fovea, at the centre of the macula, is packed with light- sensitive cells and is the most sensitive part of the retina,
8. Vitreous humour: The back part of the eye is filled with a jelly-like substance called vitreous humour,
9. Lens : The elastic lens can change shape to focus light rays from both near and distant object, 10. Sclera : The tough sclera is the white of the eye, forming the outer coat of the eyeball,
11. Conjuctiva: This thin, transparent membrane covers the white of the eye andforms the lining of the eyelids,
12. Aqueous humour: This watery fluid, produced by the ciliary body, fills front chamber of the eye, which is between the lens and the cornea,
13. Cornea: This transparent cornea at the front of the eye plays an important role in focusing light rays,
14. Pupil: Light enters the back part of the eye through the pupil, the opening in the centre of the coloured iris,
15. Iris: The coloured iris of the eye contains muscles that control the size of the pupil,
16. Suspensory ligament: The fibers of the suspensory ligament attach the lens to the ciliary body,
17. Ciliary body: The ciliary body controls lens thickness to focus light correctly; it also secretes aqueous humour,
18. Skull bone: The bony orbit of the skull protects the eyeball.
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