Ch 20. Corneal Ulcer

Question 1

comparing overnight use vs daily use,

Which contact lense confers the higher risk for infectious keratitis?

Answer 1

Overnight use has a higher risk.

Question 2

In a patient with a corneal ulcer, what is suggested by the presence of a rolled border and an oval central lesion?

Answer 2

Rolled Borders and an oval distribution is characteristic of neurotrophic keratitis, added to an invertion in the fluorescein-rose bengal staining pattern and decreased sensitivity.

Question 3

What type of infectios ulcer would be the most likely Dx?

Answer 3

Fungal infection.

The round, feathery white appearance points to Candida as the infectious agent.

Question 4

How is the natural course of a streptococal keratitis?

Answer 4

Rapidly progressing, as a highly acute and highly supurative reaction.

Produces a deep corneal ulcer with active “serpiginous” borders.

Associated to sterile hypopyon

After a corneal Graft, it may recur as infectious crystalline keratopathy

Question 5

The central cracked windshield, and the peripheral brush fire are signs of which corneal infections?

Answer 5

Nocardia & Mycobacterium