Keratitis

Question 1

Describe a herpes simplex ulcer

Answer 1

Dendritic epithelial ulcer of the cornea

Question 2

How do we treat herpes simplex ulcers?

Answer 2

Acyclovir eye ointment 5x a day for 10 days

Question 3

Why is it important to confirm corneal ulcer diagnosis with a scrape?

Answer 3

Topical steroids applied to a herpes ulcer will cause an amoeboid ulcer which is very difficult to treat

Question 4

How does ophthalmic varicella zoster present?

Answer 4

Dermatomal ophthalmic branch of trigeminal skin rash, with or without hutchinson’s sign.
Conjunctivitis is common, rarely can develop a corneal ulcer

Question 5

How do we treat ophthalmic shingles?

Answer 5

Topical steroids and systemic aciclovir

Question 6

Which type of conjunctivitis can cause keratitis?

Answer 6

Adenoviral conjunctivitis can rarely cause a fluffy white corneal opacity

Question 7

How do we treat adenoviral conjunctivitis induced keratitis?

Answer 7

Topical steroids

Question 8

What causes marginal keratitis?

Answer 8

Blepharitis

Question 9

List some predisposing factors for a bacterial keratitis?

Answer 9

Corneal trauma
Contact lenses
Corneal exposure
Corneal anaesthesia 
Treat with broad spectrum antibiotics