click below
click below
Normal Size Small Size show me how
The Eye Vocab
| Term | Definition |
|---|---|
| aqueous and vitreous humors | the watery fluid that fills the anterior and posterior chambers of the eye |
| choroid | the middle layer of the wall of the eye |
| ciliary body | the structure between the choroid and the iris that anchors the lens in place |
| ciliary glands | modified sweat glands located between the eyelashes |
| cones | sensory cells in the retina that are sensitive to bright light and provide color vision |
| conjunctiva | a delicate external membrane that covers the exposed eyeball and lines the eyelid |
| cornea | a transparent tissue over the anterior center of the eye |
| extrinsic muscles | muscles attached to the outer surface of the eye that are responsible for changing the direction of viewing |
| iris | the anterior portion of the choroid, which gives the eye its color |
| lacrimal glands | tear secretors; located above the lateral end of each eye |
| lens | a transparent, flexible, structure , that is curved outward on both sides |
| optic chiasma | the point at which the topic nerves criss |
| optic nerve | transmitter of visual sensory signals to the occipital lobe of the brain |
| optic tracts | the continuation of the optic nerve fibers beyond the optic chiasma |
| pupil | the opening through which light rays enter the eye |
| retina | the innermost layer of the eye, containing light sensitive nerve endings that send impulses through the optic nerves to the brain |
| rods | sensory cells in the retina that are activated in dim light |
| sclera | the tough, fibrous outer layer of the eye |
| suspensory ligaments | tiny structures that attach the lens of the eye to the ciliary body |
| tarsal glands | secretors of an oily substance; located in the eyelids |