NURS253 Lecture Notes - Lecture 4: Pupillary Light Reflex, Corneal Reflex, Lacrimal Apparatus
20 Feb 2019
School
Department
Course
Professor
Document Summary
Palpebral - lines inside of eyelid: lacrimal apparatus - gland that produces tears, extra ocular muscles - controls 6 different directions of eyes, cn 3, 4, and 6 - responsible for muscle control, internal structure. Sclera - dense white covering; supports internal structure of eye. Cornea - permit entrance of light; has lots of nerve endings; makes it very responsive to pain and touch, corneal reflex. Iris - circular disk of muscles; the pigmentation part. Ciliary body - muscle tissue that controls the thickness of the lens; helps adapt focusing on things near and far. Pupil - controls the muscle in the iris, controls the amount of light entering your eye. Lens - transparent; refracts light into the retina; will change shape depending on what you"re focusing on; bulges for close objects; flattens for far objects. Choroid layer - provides nourishment to eye; prevents light from reflecting internally.
