NUR 306 Lecture Notes - Lecture 10: Far-Sightedness, Entropion, Corneal Reflex
Document Summary
Lacrimal glands: secrete aqueous layer of tear film. Spherical structure that focuses light on retina. Macular degeneration: affects the central nervous system, blurred spot in vision. Affects african americans more often than caucasians. Has wide and open angle between the iris and cornea. Blind spot in the visual field surrounded by an area of normal or decrease vision. Caused by age related changes that occur as the jelly like substance inside your eyes becomes more liquid. Exophthalmos: abnormal protrusion of the eyeball or balls. Cataracts (diabetes): opacity of the normally clear lens which may develop as a result of aging, metabolic disorders, trauma or heredity. Periorbital edema: edema in the under eye sockets. Aqueous (water) layer: nourishes and protects the cornea. Mucin layer: adheres tears to the eye. Ptosis (drooping upper eyelid), caused by cranial nerve 3. Horner"s syndrome: disruption of a nerve pathway from the brain to the face and eye on one side of the body.
