Corneal Dystrophies & Degenerations in Cats: A Vet’s 2025 Guide to Eye Clarity 😺👁️

Corneal Dystrophies & Degenerations in Cats: A Vet’s 2025 Guide 😺👁️

By Dr Duncan Houston, BVSc

🔎 What Are Corneal Dystrophy & Degeneration?

Corneal dystrophy in cats is a rare, inherited, bilateral condition—most often endothelial dysfunction—leading to progressive cloudiness or even bullous keratopathy over time.

Corneal degeneration involves lipid or calcium accumulation and scarring, often following injury, inflammation, or systemic disease—it’s unilateral or bilateral.

⚠️ Causes & Who’s at Risk

• Genetic dystrophy: Suspected recessive pattern in breeds like Manx and domestic shorthairs—early stromal/endothelial edema develops into bullae over years.
• Lipid/calcium deposits: Secondary to corneal damage/inflammation; may be worsened by systemic hyperlipidemia or metabolic disorders.
• Corneal sequestrum: Necrotic dark lesion exclusive to cats, causes pain and ulceration.

🚩 Signs & Symptoms

• Cloudy, bluish-gray corneal appearance; bullae in endothelial dystrophy.
• Pain signs: blinking, squinting, tearing—especially with sequestra or ulceration.
• Deposits: white crystalline or metallic flecks; lipid arcs or calcium rings; possible vascularization in degenerative cases.
• Vision impairment: mild to moderate in dystrophies; ulceration can severely affect eyesight.

🔬 Diagnostic Tools

• Fluorescein staining: Identifies ulcers or sequestra.
• Tonometer: Rule out glaucoma-linked edema.
• Slit-lamp biomicroscopy: Evaluates lesion location (epithelial, stromal, endothelial) and vascularization.
• Blood tests: Screen lipids, calcium, metabolic causes if degeneration suspected.
• Cytology/biopsy: For sequestra or atypical lesions (rare corneal neoplasia).

🛠️ Treatment & Medical Care

Corneal Dystrophy

• Asymptomatic cases require no intervention.
• Medical options: hyperosmotic drops (e.g., 5% sodium chloride) for edema, topical steroids for mild inflammation; contact lenses to protect epithelium.
• Surgery: conjunctival flaps, superficial keratectomy, or corneal transplant in severe bullous cases.

Corneal Degeneration

• Treat underlying inflammation or infection with topical antibiotics/steroids.
• Superficial keratectomy may remove deposits and smooth the surface.
• Diet modification and monitoring if systemic lipid issues are involved.

Corneal Sequestrum

• Surgical excision of sequestrum, often with graft/flap; pain relief and antibiotics follow.

🏡 Home & Long-Term Care

• Keep eyes clean; use prescribed drops and ointments on schedule—set reminders via **Ask A Vet**.
• Monitor for pain signs, cloudiness, tearing—prompt vet attention for new ulcers.
• Protect environment: reduce irritants (dust, smoke), use soft bedding from **Woopf** & **Purrz**.
• Regular ophthalmic check-ups: evaluate progression, manage medications, consider specialist referral.

📅 Prognosis & Follow-Up

• Dystrophy: Vision often preserved; bullous cases need surgery—otherwise monitoring.
• Degeneration: Outcome depends on controlling inflammation or metabolic drivers.
• Sequestrum: Surgery is usually curative; recurrence is possible in some breeds.
• Follow-up schedule: Every 3–6 months or sooner if changes—include detailed ocular exam, tonometry, and imaging if needed.

📝 Quick Reference Table

🐾 Corneal dystrophies and degenerations, though uncommon, can affect a cat’s eye comfort and clarity. With expert diagnosis, tailored medical or surgical treatment, and diligent home care—including support via **Ask A Vet** and soothing environments with **Woopf** & **Purrz**—most cats remain comfortable and see well. ❤️

📢 Always consult a veterinary ophthalmologist for detailed care—early detection and timely treatment protect precious feline vision.

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