Corneal Ulcers in Cats: A Vet’s 2025 Guide to Diagnosis & Healing 😺👁️
By Dr Duncan Houston, BVSc
🔍 What Are Corneal Ulcers?
A corneal ulcer (ulcerative keratitis) is a loss of corneal epithelium—and possibly deeper stroma—due to trauma, infection, or disease :contentReference[oaicite:3]{index=3}.
⚠️ Causes & Risk Factors
- Trauma: scratches, foreign bodies, rubbing, chemical exposure :contentReference[oaicite:4]{index=4}.
- FHV‑1 infection: dendritic ulcers, delayed healing :contentReference[oaicite:5]{index=5}.
- Bacterial or fungal invasion: especially in deeper or melting ulcers :contentReference[oaicite:6]{index=6}.
- Dry eye, eyelid disease, metabolic issues: keratoconjunctivitis sicca, entropion, systemic illness :contentReference[oaicite:7]{index=7}.
🚩 Signs to Look For
- Squinting, blinking, blepharospasm, photophobia :contentReference[oaicite:8]{index=8}.
- Tearing, discharge, redness, cloudy cornea, eye rubbing :contentReference[oaicite:9]{index=9}.
- Painful deep ulcers may cause ulcer crater or vascularisation :contentReference[oaicite:10]{index=10}.
🔬 Diagnostic Approach
- Ocular exam & history: trauma or illness triggers :contentReference[oaicite:11]{index=11}.
- Fluorescein stain: identifies epithelial defects, depth of ulcer :contentReference[oaicite:12]{index=12}.
- Schirmer tear test & tonometry: check tear production and intraocular pressure :contentReference[oaicite:13]{index=13}.
- Cytology/Culture: in deep or infected ulcers to guide antibiotics :contentReference[oaicite:14]{index=14}.
🛠️ Treatment & Management
1. Medical Therapy
- Topical antibiotics: essential even in superficial ulcers :contentReference[oaicite:15]{index=15}.
- Antivirals: topical (cidofovir, idoxuridine) or oral for FHV‑1; L‑lysine use is controversial :contentReference[oaicite:16]{index=16}.
- Pain relief: atropine drops for ciliary spasm, oral analgesics as needed :contentReference[oaicite:17]{index=17}.
- Serum drops: autologous serum promotes healing in deep ulcers :contentReference[oaicite:18]{index=18}.
- Collagenase inhibitors: e.g. acetylcysteine in melting ulcers :contentReference[oaicite:19]{index=19}.
2. Prevent Self-Trauma
- Elizabethan collar until healed :contentReference[oaicite:20]{index=20}.
3. Surgical Intervention
- Conjunctival grafts/flaps: for deep or non-healing ulcers :contentReference[oaicite:21]{index=21}.
- Soft contact lenses: protect epithelium in superficial or melting ulcers :contentReference[oaicite:22]{index=22}.
🏡 Home Care & Ongoing Support
- Administer drops and meds on schedule—use **Ask A Vet** for reminders.
- Clean eyes gently with saline; ensure comfy, low‑dust areas with **Woopf** & **Purrz** bedding.
- Avoid irritants (smoke, fragrances); keep cat indoors to reduce re-injury.
- Monitor healing, pain, appetite and behavior; report worsening or no improvement.
📅 Prognosis & Follow-Up
- Superficial ulcers: typically heal in 7–10 days with treatment :contentReference[oaicite:23]{index=23}.
- Deep or melting ulcers: require close follow-up and possible surgery; risk of scarring or perforation :contentReference[oaicite:24]{index=24}.
- FHV‑1 cases: prone to recurrence; stress management, hygiene, and antivirals help :contentReference[oaicite:25]{index=25}.
- Regular rechecks until full epithelial closure; advanced imaging or specialist referral if needed.
📝 Quick Reference Table
| Aspect | Summary |
|---|---|
| Cause | Trauma, FHV‑1, infection, dry eye |
| Signs | Pain, tearing, squinting, cloudiness |
| Diagnosis | Exam, fluorescein, tear/pressure tests, cytology |
| Treatment | Topical meds, pain control, collars, serum, surgery |
| Home Care | Drop schedules, clean environment, collar use |
| Prognosis | Good if treated early; advanced ulcers need close care |
🐾 Corneal ulcers in cats are common emergencies—early diagnosis, proper treatment, and diligent care help preserve vision and comfort. Support healing with **Ask A Vet** guidance, and create soft, low-irritant spaces with **Woopf** & **Purrz**. Your cat’s eyes will thank you! ❤️
📢 Always follow veterinary instructions carefully; eye conditions can escalate rapidly—don’t delay care.
© 2025 AskAVet.com
This article is general veterinary education and does not diagnose or treat an individual animal. Always confirm medication names, doses and interactions with the veterinarian who knows your pet.
If your animal is struggling to breathe, collapsed, bleeding heavily, seizing, or has eaten something toxic, contact your vet or the nearest emergency clinic now.
Animal Poisons Helpline (AU) 1300 869 738 · Animal Poisons Helpline (NZ) 0800 869 738 · ASPCA Animal Poison Control (US) (888) 426-4435
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Ask A Vet articles are written by Dr Duncan Houston BVSc, a practising veterinarian, unless another author is named in the byline.
