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62 Cards in this Set
- Front
- Back
Glaucoma is the second leading cause of blindness world wide. True/False
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True
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The percentage of the population that will develop glaucoma decreases or increases with advancing age?
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Increases
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Where is glaucoma prevalent?
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In people with diabetes
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What are the types of glaucoma? x4
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1. Open-angle
2. Angle-closure 3. Low-tension 4. Secondary |
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What is the most common form of glaucoma?
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Open-angle
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What can glaucoma cause?
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Degeneration of the optic nerve
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How is increased IOP (intraocular pressure) caused?
What is it a symptom of? |
- A buildup of aqueous humor
- Glaucoma |
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How does the aqueous humor accumulate?
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When the angle formed by the iris and the cornea is reduced and drainage of fluid is blocked
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What are the two main classifications of drugs used to treat glaucoma?
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Drugs that decrease formation of the aqueous humor and drugs that promoe drainage of aqueous humor
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What classes of drugs decrease formation of the aqueous humor? x3
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1. Beta blockers
2. Alpha-adrenergic agonists 3. Carbonic anhydrase inhibitors |
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What classes of drugs promote the drainage of aqueous humor? x3
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1. Cholinergics
2. Cholinesterase inhibitors 3. Prostiglandin analouges |
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What do miotics do?
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Cause contraction of the pupil
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Perception of balance and movement is a function of what? x3
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1. Eyes
2. Inner ear 3. Sense receptors on the skin and skeleton |
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What do the semicircular canals in the inner ear control?
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The sense of equilibrium
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Otosclerosis and autoimmune diseases such as multiple sclerosis can cause what?
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Hearing loss
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SSHL is treated with what?
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Glucocorticosteroids
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Otosclerosis can cause what?
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Ringing in the ears (tinnitus)
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Tinnitus can be drug induced. True/False
If so what are the drugs? |
-True
-Alcohol and asprin |
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What two kinds of drugs can cause ototoxicity?
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Aminoglycoside anti-infectives and loop diuretics
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BPPV is the second leading cause of vertigo. True/False
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False, It's the number 1 cause
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Ménière's disease is the second most common cause of vertigo. True/False
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True
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What is vertigo?
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A balance disorder caused by a neural mismatch or sensory conflict
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How can vertigo occur? x5
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1. Head trama or degeneration of otolith organs
2. Inflammation of the vestibular nerve 3. Bacterial infection of the labyrinths 4. Brainstem or cerebral pathology 5. Ménière's disease |
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Vertigo and other balance disorders produce what symptoms? x5
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1. Dizziness or spinning
2. Nausea and vomiting 3. Blurred vision 4. Disorientation 5. A feeling of falling |
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Treatment of balance disorders may include what? x3
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1. Physical thearapy
2. Diet changes 3. Lifestyle changes |
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When drug therapy is recommended, what is most commonly used?
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Antihistamines
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What do antihistimines have?
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Anticholinergic actions that can moderate symptoms of motion sickness. They are contradicted in people with prostate disease, asthma, and woman who are lactating
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Where is a scopolamine transdermal patch placed to prevent motion sickness?
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Behind the ear
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What is ear pain called?
What is it a symptom of? |
-Auralgia or otalgia
1. Otitis media 2. Otitis externa 3. Other ear disorders |
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How is ear pain treated? x3
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1. Topical analgesics
2. Local anesthetics 3. Oral analgesics |
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When the ear is inflamed, otic suspensions are less soothing than solutions containing alcohol. True/False
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False
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Water-clogged ears and swimmer's ear are different conditions that often get confused. True/False
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True
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Swimmer's ear does what?
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Produces inflammation and infection of the external ear
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What are safe and effective for the treatment of water-clogged ears?
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Nonperscription drying agents
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Cerumen (earwax) is a normal but unnecessary substance produced by the ear. True/False
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False
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What is cerumen?
What does it provide? What does it do? |
- A bactericidal and water repellant.
- A barrier to entry of airborne substances -Lubricates the skin of the external ear canal |
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You can use cotton-tipped applicators or other small sharp objects to remove earwax. True/False
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False
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What are the principal ingredients found in crumenolytics? x2
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1. Emollients
2. Carbamide peroxide |
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What should you do after administration of emollients or peroxide-based agents?
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Genlty clense the affected ear with warm water to remove cerumen that has become dislodged
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What is belpharitis?
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A chronic eye disease that produces distinctive flaky scales on the eyelids and eyelashes.
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What can conjunctivitis (pink eye) be caused by?
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A virus or bacteria
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How is uveitis (inflammation of the uvea) treated?
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With administration of coritciosteroids, mydratics, and anti-infectives or antivirals as appropriate
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Microbial keratitis and fungal keratitis are most commonly caused by what? x3
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1. Trauma
2. Immunodeficiency 3. Chronic eye surface diseases |
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Soft contact wearers are not at risk for fungal keratitis. True/False
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False
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What is a stye?
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A small, painful lump on the eyelid that is caused by an acute self-limiting infection of the oil glands of the eyelid
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What is CMV retinitis?
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An opportunistic infection in the eye that occurs in patients who have HIV infection/AIDS or who take immunosuppressive drugs. If it is untreated it can cause blindness.
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How many cases of blindness annually does herpetic corneal disease cause?
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Over 500,000
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How are herpes infections of the eye treated? x3
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1. Antiviral eye drops
2. Orally administered drugs 3. Both |
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Where does herpes virus live?
What does it produce when it becomes active? |
- Around nerve fibers
- Painful symptoms |
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What causes ocular toxoplasmosis?
How is it transmitted? x2 |
- Protozoa
1. Handling or eating raw and undercooked meat 2. Handling cat feces |
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What can toxoplasmosis cause?
How is it treated? |
1. Ocular inflammination
2. Vasculitis 3. Uveitis 4. Retinal edema - By administering pyrimethamine and sulfonamides |
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What are helminthes?
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Parasitic worms that cause eye infections and blindness
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What is onchocerciasis (river blindness) caused by?
It is the second leading caused of infectious blindess in the world. True/False |
- A round worm
- True |
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How is onchocerciasis treated?
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By administering a single dose of ivermecin yearly
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How is cysticercosis transmitted?
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By eatting undercooked pork
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How is cysicercosis treated? x3
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1. praziquantel
2. Coritcosteroids 3. Surgical removal of the living worms |
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Toxocariasis is the leading cause of uveitis world wide. True/False
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False, fifth leading cause
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How is toxocariasis treated? x2
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1. Topical coritcosteroids
2. Systemic anthelminthics |
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What are the risk factors for developing otitis externa? x5
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1. Exposure to excessive moisture
2. High environmental temperature 3. Irritation caused by earwax removal 4. Insertion of objects into the ear 5. Chronic dermatological disease |
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What is otitis media?
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Inflammation of the middle ear
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What can excessive use of anti-infectives to treat otitis media do?
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Increase the risk of development of bacterial resistance
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Decongestants and antihistamines are recommended for for prophylaxis or treatment of otitis media in children. True/False
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False
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