Eye injury or sudden eye pain

Possible signs

• Squinting, rubbing, marked redness, cloudiness, tearing, bulging or visible damage
• Keeping one eye closed, light sensitivity, a raised third eyelid or unequal pupils may indicate pain or injury

What it is

Even a small injury to the eye surface can be very painful, and some disorders deepen within hours. Causes include a corneal scratch or ulcer, foreign material, chemical exposure, eyelid disease, infection, glaucoma and trauma. Conditions that look similarly red from the outside can require very different treatment; the wrong drops may delay healing or worsen injury.

What to expect at the veterinarian

The veterinarian will check vision responses, eyelids and the eye surface. Fluorescein stain is commonly used to find a corneal ulcer and eye pressure may be measured; a tear test or ophthalmology referral may be needed. Care can include a protective collar, condition-specific eye medicine, pain control or surgery.