Matching Pairs The eyesOnline version The eyes by Alba Castellano Navarro 1 Eyelashes 2 Lacrimal glands 3 Optic nerve 4 Aqueous humour 5 Cristaline lens 6 Sclera 7 Fovea 8 Eyebrows 9 Vitreous humour 10 Pupil 11 Eyelid 12 Retina 13 Iris Is the opaque, white outer layer. The front part (cornea) is transparent. Produce tears, which clean the eye and keep it moist. They also destroy bacteria. Are folds of skin that are opened and closed by the eye orbit muscles. They prevent the eyeball from drying out and stop particles from entering. Is an area of the retina with many cones. It is responsible for sharp vision. It is an elastic, transparent, biconvex structure behind the iris. It is the hole in the center of the iris. It transmits the information to the brain. Are hairs that grow out of the eyelids. They limit access to light and stop particles from entering the eyes. It is a transparent fluid between the cornea and the crystalline lens. Is a circular structure. Its colour varies from person to person. It is the internal layer of the eyeball that contains photoreceptor cells called cones and rods. Are hairs that stop sweat from entering the eye. It is transparent, gelatinous fluid filling the eyeball.
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