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Parts of the Eye Outside the eye: Eyebrows keep s____t from dripping into the eye. Eye la______s help prevent dust and debris from getting into the eye. Tear glands under the skin above and below the eye produce t_____s to l_______e the eye and special chemical help k___l bacteria. The tear duct drains excess tears away, draining to the back of the n____e. Inside the eye: use the word list to match the parts with their locations (iris, cornea, pupil, sclera, retina, lens muscle, lens, choroid (pronounced KOR-oid), optic nerve) a b c d e f g h i Functions of the parts of the eye Put the part in its correct place below (iris, cornea, pupil, sclera, retina, lens muscle, choroid, optic nerve) : clear “skin” focuses some light entering the eye : hole in the iris, allows light into the eye : muscle that controls size of the pupil and therefore how much light enters the eye : the white of the eye, tough tissue that helps protect it : focuses light on the retina : changes shape of the lens to help it focus light : has light sensitive cells that detect/absorb light : carries information from the eye to the brain : lies between the retina and sclera. It is composed of layers of blood vessels that nourish the back of the eye. Extra for experts *Aqueous Humor: jelly like substance between cornea and lens, clear (allows light through). Provides support for eye *Conjunctiva: clear layer covering sclera and eyelid, helps lubricate eye. * Vitreous Humor: jelly like substance between lens and retina, clear (allows light through). Provides support for eye