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