Corneal ulcers/keratitis Flashcards
What does a bacterial keratitis present with?
hypopyon - level of white cells in the eye
What group of people are most likely to get a bacterial keratitis?
people who already have eye problems or wear contact lenses
How are bacterial keratitis diagnosed?
corneal scrapes
How are bacterial keratitis treated?
Ofloxacin hourly - main one
gentamicin
cefuroxime
What causes a dendritic ulcer?
herpes simplex
Describe a dendritic ulcer?
looks like a branching tree
very painful
can be recurrent and result in a reduced corneal sensation
What should you not use to treat a dendritic ulcer?
steroids - cause corneal melt
What should you use to treat a dendritic ulcer?
aciclovir ointment
What is the presentation of an adenovrius keratitis?
subepithelial infiltrates
usually follows a URTI
usually bilateral
What is the treatment of adenovirus keratitis?
topical antibiotics
contageous
if chronic - give mild steroids
What fungi can cause keratitis?
acanthamoeba
pseudomonas aeruginosa
How can an acanthamoeba infection occur?
poor contact lense hygiene - ie washing them in water
diagnose with a culture/microscopy
What causes a central keratitis?
infective: viral fungal bacterial acanthomoeba
What causes a peripheral keratitis?
autoimmune:
rheumatoid arthritis
hypersensitivity
GPA - rarely
Why are peripheral keratitises autoimmune based?
circulating antibody complexes get distributed into the limbus
