Flashcards in Posterior Chamber DIsorders Deck (25):
- Primary event is retinal tear
- Vitreous fluid passes through tear and lodges behind the sensory retina.
- Retina progressively detaches.
Predisposing retinal detachment factors
Retinal detachment S/S
- Blurred vision in one eye
- Floaters, move about vision
- Flashing lights
- No pain or redness
Central Retinal Artery Occlusion (CRAO)
An embolism that enters and occludes the retinal artery
CRAO predisposing factors
Carotid artery disease
Sudden profound monocular vision loss
Can detect hand movements, but cant count fingers
Main fundascopic exam finding in CRAO
**Pallor of the optic disc**
Inchemic retinal whitening
Cherry red macula
Marked afferent pupillary defect
Very poor vision prognosis if not resolved within 90 minutes.
Central Retinal Vein Occlusion
An occlusion of the central vein that results in vision loss. Painless.
Refer to an optho
A Pt with a central retinal artery occlusion should be screened for?
Diabetes, HTN, Hyperlipidemia and Glaucoma
Monocular loss of vision lasting a few minutes with a complete recovery
Characterized by a curtain closing vertically over the visual field, and a similar curtain opening.
What must be evaluated in patients with amaurosis fugax?
- Doppler ultrasound of carotids
- EKG to R/O A.fib
Amaurosis Faux Tx
Low dose ASA
Generally occurs in young females and is an early sign of MS.
Unilateral decrease in vision over 1-3 days
Loss of color vision
How to pupils appear in optic neuritis?
Relative afferent pupillary defect (RAPD)
Should oral steroids be given to patients with optic neuritis?
NO, push IV steroids. Oral steroids are malpractice for some reason...
Optic disc swelling due to increased intracranial pressure.
-Brain abscess, meningitis
Slow vision loss from ICP/optic nerve swelling
Acute attacks of blindness while lying flat
disc margins blurred
Giant cell Arteritis - Temporal Arteritis
Sudden, painless nonprogressive vision loss.
HA, scalp tenderness
Pale, swollen disc
Treat with steroids (do not wait for biopsy)
Refer to surgery
Age Related Macular Degeneration (ARMD)
10% of elderly have it
Wearing out of the retina and photoreceptors
More common in caucasians
Gradual vision loss
Sudden vision loss
Accumulation of fluid and blood
Acute distortion in vision