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Impaired Vision/Hear
Test II, N101
Question | Answer |
---|---|
Layer of blood vessels between retina and sclera | Choroid |
can see chgs with some illnesses such as diabetes | Choroid |
Clear front window in front of eye which transmits or focuses light into eye | cornea |
Affects near & far sight | Cornea |
Sharpens vision | Fovea |
Center of macula which provides sharp vision | Fovea |
Area in retina that has special light-sensitive cells which allow us to see fine details clearly in the center of our visual field | Macula |
Deterioration of macula, as we age, leads to | macular degeneration |
Fine Details | Macula |
Colored part of eye which helps regulate amount of light entering eye | Iris |
iris closes pupil to let in less light | bright light |
iris opens pupil to let in more light | low light |
Nerve layer lining the back of the eye | retina |
senses light and creates electrical impulses sent through the optic nerve to the brain | retina |
White, outer coat of eye which surrounds iris | sclera |
Clear, gelatinous substance filling central cavity of the eye | vitreous humor |
Focuses light rays into retina | lens |
Transparent and can be replaced | lens |
____ makes lens deteriorate, resulting in need for reading glasses | aging |
used to replace lens clouded by cataracts | Intraocular lens |
Bundle of nerve fibers carry visual images from the retina to the brain | optic nerve |
Dark center in the middle of the iris | Pupil |
_____ -> Bundle of Nerve Fibers (visual images) -> brain | Retina |
uniform red reflex, clear and yellow optic nerve disc, reddish retina, and light red arteries and dark red veins | Normal findings |
Cloudiness of lens, changes in shape or size of blood vessels and changes in color and surface characteristics | Abnormal findings |
normal visual acuity measured at a distance of 20 feet | 20/20 vision |
means you must be as close as 20 feet to see what a person with normal vision can see at 100 feet | 20/100 vision |
only indicates the sharpness or clarity of vision at a distance | 20/20 vision |
inability to bring nearer objects into focus (farsightedness) | hyperopia |
loss of focusing ability | Presbyopia |
can see items that are close, but cannot see those far away. (nearsightedness) | Myopia |
Vision gets worse over time | myopia |
vision tends to get better over time | hyperopia |
measures the ability to see close up, 14 inches from the eye | near vision |
measures the eyes' need for corrective lenses (refractive error) | Refraction test |
nearsightedness or farsightedness, when light rays entering the eye can't focus exactly on the nerve layer (retina) at the back of the eye | Refractive errors |
Snellen’s Eye Chart | Visual Acuity |
Most common disease treated by eye physicians | Dry Eye Syndrome |
Leaking vessels lead to swelling or edema in retina and decreased vision | Diabetic Retinopathy |
Clouding of natural lens | Cataracts |
Increased intraocular pressure (IOP) resulting in malformation or malfunction of eye’s drainage symptoms | Glaucoma |
Degenerative disease of macula (central retina) | Macular Degeneration |
Vitamin beneficial | zinc |
Auricle, pinna | Outer ear |
External auditory meatus ,ear canal | Outer Ear |
Tympanic membrane, eardrum | Outer Ear |
_________ separates external ear from inner ear | Eardrum |
Malleus/hammer Incus/anvil Stapes/stirrup | Ossicles |
Ossicles | Middle Ear |
Transfer vibrations to the inner ear | Middle Ear |
______ houses true mechanism of hearing, the Organ of Corti which contains tiny hair like nerve endings | Cochlea |
Cochlea houses true mechanism of hearing, the _____ __ ______ which contains tiny hair like nerve endings | Organ of Corti |
Transfer sound to the brain | Nerve Endings |
Cochlea & Organ of Corti | Inner Ear |
Growths within outer ear (resemble bumps or pimples). | Aurual Polyps |
Allergies from foreign objects (earrings, cosmetics, shampoos,etc). Remove allergen. | Contact Dermatitis |
traps debris & microorganisms, contains immunoglobulins for immunity, provides moisture for tympanic membrane | Ear Wax |
can affect hearing. Usually caused by wax | Blockages in external ear |
middle ear infection | Otitis media |
Symptoms: earache, headache, fever, discharge from ear, mild deafness, difficulty sleeping, decreased appetite | Otitis media |