Flashcards in Eye Pathology Deck (90)
What can conjunctivitis be cause by?
Bacterial or viral infection
What are some of the symptoms of conjunctivitis?
Red watery eye
What is the treatment for conjunctivitis?
ABI eye drops
If a stye is present externally, what does it affect?
Sebaceous glands on eyelash
What is another name for a stye?
What does a stye affect on the inner surface of eyelid?
Name an inflammatory condition of the cornea
Name a non-inflammatory condition of the cornea
What are some of the causes of corneal ulcer?
Infectious - bacteria, fungal, viral infect of cornea
Corneal dystrophies usually present with:
What is the most common cause of blindness?
What is the pathology of cataracts?
What is the main cause of cataract?
UV light - damages lens fibres
What surgery can be used to treat cataracts?
Phacoemulsification - plastic lens replaces new one
What is the usual intraocular pressure?
How is pressure in the eye maintained?
By constant drainage of AH via the Schlemms canal
What is glaucoma defined as?
What is the 2nd most common cause of blindness?
What is the most commonly seen form of glaucoma?
Primary Open Angle Glaucoma (POAG)
What are some consequences of raised IOP?
Pressure on nerve fibres results in death of optic nerve head
In glaucoma, what does the optic nerve head appear like?
Pale, unhealthy & cupped
What happens to the visual field in glaucoma?
Loss of peripheral vision
What are the triad of signs observed in glaucoma?
Raised IOP (painless)
Visual field defects
Optic disc changes on ophthalmoscopy
What can be used to treat POAG?
Eye drops to decrease IOP - prostaglandin analogues, Beta blockers
How does angle closure glaucoma present?
Sudden onset, painful loss of vision & headaches
What does the eye appear like in AC glaucoma?
What is the pathology of AC glaucoma?
Closure of anterior angle resulting in problems with AH drainage
What are the different ways in which angle closure can occur?
Functional block - small eye, large lens
Mid-dilated pupil - outflow obstructed by iris dilation
What is the management for AC glaucoma?
Decrease IOP - carbonic anhydrase inhibitors
Constrict pupil - pilocarpine
Antiemetics & analgesics
Iridotomy - laser