Which feature is not typical of a corneal ulcer in horses?

• A. Deep stromal involvement
• B. Non-infected with no infiltrates
• C. Small size
• D. Acute onset

Answer: (A)

Deep stromal involvement is not typical of a simple corneal ulcer in the horse. Most uncomplicated equine corneal ulcers are shallow, affecting mainly the epithelium, and present acutely with pain and tearing. When the ulcer extends into the stroma, it signals a more severe or complicated keratitis (for example bacterial or fungal invasion, stromal abscess, or melting ulcers), requiring more aggressive diagnostics and targeted therapy. The other features—small size and abrupt onset—fit the common presentation of an uncomplicated equine ulcer. Involvement limited to the stroma would raise concern for a different or more advanced process.