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Chapt 11-12
Anatomy
Question | Answer |
---|---|
What are the functions of the eyes? | receptor organs for sight so we receive images; brain transmits to optic nerve |
ocul- | eye |
-ar | pertaining to |
extra- | outside of the eyeball |
intra- | within the eyeball |
optic- | pertaining to the eye |
adnexa | AKA adnexa oculi |
What are the structures of the eyes? | outside the eyeball, include the orbit, eye muscles, eyelids, eyelashes, conjunctiva & lacrimal apparatus |
orbit | AKA eye socket |
eye muscles: | 6 major; arranged in 3 pairs in each eye |
binocular | refers the use to of both eyes working together |
How do the eye muscles work? | they work together in coordinated movements that enable normal binocular vision |
upper & lower eyelids | help protect the eyeball from foreign matter, excessive light, & injuries due to other causes |
canthus | is the angle where the upper & lower eyelids meet |
inner canthus | where the eyelids meet nearest the nose |
epicanthus | a vertical fold of skin on either side of the nose; not everyone has |
outer canthus | where the eyelids meet farthest from the nose |
tarsus | AKA the tarsal plate, is the framework within the upper & lower eyelids |
eyebrows & eyelashes | prevent foreign matter from reaching the eyes |
eyelashes consists of | small hairs known as cilia |
the edges of the eyelids contain | oil-producing sebaceous glands |
conjunctiva | is the transparent mucous membrane that lines the underside of each eyelid & continues to form a protective covering over the exposed surface of the eyeball |
lacrimal apparatus |