TL;DR: A corneal scratch from a cat claw is a high-urgency veterinary emergency that requires immediate professional care to prevent permanent vision loss or eye rupture. Providing a clear photo helps the veterinary team prioritize your case and prepare for your arrival.
What is a corneal scratch and why is it dangerous for my dog?
A corneal scratch, or corneal ulcer, is a physical tear on the clear outer surface of your dog's eye. When caused by a cat claw, these injuries are especially concerning because the sharp, curved nature of the claw can penetrate deep layers of the eye, and the bacteria present on the claw can lead to a rapid, sight-threatening infection.
Is a corneal scratch in a dog a veterinary emergency?
- Urgency Level: High. A deep corneal scratch is always considered a veterinary emergency.
- Unlike minor skin abrasions, eye injuries can deteriorate in a matter of hours.
- If the scratch is deep enough, the eye may be at risk of rupture.
- Immediate professional evaluation is required to prevent permanent vision loss or the need for surgical removal of the eye.
Why should I provide a photo of my dog's eye for triage?
- Providing a clear, close-up photo of the eye to your veterinarian or a triage service can be life-saving.
- A photo allows a professional to look for signs of a 'perforating' injury, internal bleeding, or changes in the eye's shape.
- Visual information helps the clinic prioritize your dog's case and prepare the necessary ophthalmic equipment before you even arrive.
Clinical Context (Merck Veterinary Manual)
Partial-thickness corneal lacerations are typically painful and require apposition with simple interrupted absorbable sutures to the healthy cornea; excision of the lacerated section is not recommended. Full-thickness corneal lacerations typically manifest with pain, blepharospasm, tearing, a corneal defect, and variable iris prolapse, alongside marked aqueous flare, hyphema, miosis, and pupillary distortion. Anterior lens capsule lacerations greater than 2 mm necessitate lens removal to prevent lens-induced uveitis, which can progress to secondary glaucoma and phthisis bulbus. Potential complications include corneal scar formation, septic endophthalmitis, cataract formation, and secondary glaucoma. Prognosis depends on the size and position of the corneal laceration, involvement of other ocular tissues, the animal's age, the duration of the injury, and any concurrent systemic injuries.
Chapter: Ophthalmology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 1697)