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eye assess411 part 2

part two

QuestionAnswer
 20/200 - legal blindness.
30/20 good vision.
10/20 near sighted.
20/20 normal.
 Optic disc (blind spot - has no rods and cones)
causitive factors of blindness :HTN, DM,Poisoning,Brain tumor (MS, ALS(amyotrophic lateral sclerosis) - Lou Gehric’s disease)
small pox was leading cause because of blidning scars.
rubella blind at during the first trimester of pregnancy.
retrolental fibroplasia (increased oxyben supply to premature infant - baby in incubator - O2 is the priority) - production of too many small vessels - there's no big vessel based blood supply to the frontal part of eye.
dx test Ophthalmoscopy Biomicroscope Schiotz tonometer (measure IOP) Elctroretinogram Ultrasonography Fuorescein Angiography Radioactive 32P nuclear studies CT scan
glaucoma high IOP (not a disease, symptoms)
normal iop 11-22 (17mmHg). Happens at night.
primary open angle glaucoma Chronic glaucoma(develops slowly)
closed angle glaucoma Age related. Caused by a shallow anterior chamber and thus a narrow filtration angle through which the aqueous humor normally passes - ↑IOP. Can be acute, subacute, or chronic.
acute glaucoma pain in or around the eye and can be accompanied by nausea and vomiting. (Sxs : seeing colored halos around lights, blurred vision, and ocular redness. The acute pressure rise may cause corneal edema, giving the cornea a frosted appearance)
secondary glaucoma from disease, HTN, DM, tumor, inflammation, Uveitis(nonspecific intraocular inflammation), Iritis, trauma, degenerative process.
Congenital glaucoma Imbalance in production and secretion of aqueous humor.Obstruction.
Primary open angle glaucoma Higher than 30mmHg. 90-95% of those individuals with glaucoma. Manifestationsopen angle Poor accommodation Tired feeling of eyes, brow headache, trouble in focusing, need of changing glasses, foggy vision, poor visual acuity, impairment of peripheral visual field, Halos seen
Primary open angle glaucoma Higher than 30mmHg. Dull eye pain in early in morning. Failure to detect changes in color, May affect one eye first, bilaterally usually gradual painless onset. Ophthalmoscope shows atrophy(pale color) and cupping(indentation) of the optic nerve head. Optic nerve might be se
Created by: holla
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