Image Quiz: Ophthalmology-A cat with a chronically red eye

This cat presented with a two-month history of a red eye. It had mild blepharospasm and mucoid ocular discharge.

You perform a corneal scraping, and the results of a cytologic examination are shown below.

What is your primary rule out?

a) Primary corneal neoplasia

b) Bacterial ulcerative keratitis

c) Viral ulcerative keratitis

d) Eosinophilic keratitis

e) Fungal viral keratitis