Cat Eyes: Understanding Feline Vision, Common Eye Problems & Care Tips

I know that when you notice something off about your cat's eyes, whether it's a sudden squint, unusual discharge, or a change in that beautiful gaze, your heart drops a little. You love your cat like family, and their eyes are windows not just to their soul but to their overall health. Let me walk you through everything you need to know about feline vision, common eye problems, and how to keep those peepers healthy. The key takeaway: most cat eye issues are treatable if caught early, but some require immediate veterinary attention.

⚠️ Red-Flag Emergency Box

⚠️ Emergency: Go to the ER or your veterinarian IMMEDIATELY if your cat shows any of these signs:

• Sudden blindness (bumping into furniture, disorientation)
• Eye protruding or bulging (exophthalmos)
• Eye appears sunken (enophthalmos)
• Blood in the eye (hyphema)
• Green or yellow thick discharge (possible infection)
• Third eyelid covering more than half the eye (Haw's syndrome or neurological issue)
• Eye pain (squinting, pawing at eye, hiding, decreased appetite)
• Sudden change in pupil size (one pupil larger than the other, anisocoria)
• Trauma (scratch, fight wound, foreign object)
• Chemical exposure (household cleaners, plants)

What You're Seeing and What It Likely Means

Let's start with the basics. Cat eyes are remarkable biological instruments, evolved for hunting in low light. Understanding their normal anatomy helps you recognize when something's wrong.

Normal Cat Eye Anatomy

A healthy cat eye has:

• Clear cornea (the transparent front surface)
• Bright, even-colored iris (the colored part)
• Pupils that are equal in size and respond to light
• No discharge or minimal clear tearing
• Third eyelid (nictitating membrane) barely visible at the inner corner
• Bright, reflective tapetum lucidum (the "glow" you see at night)

What You're Seeing: Common Signs and Their Meanings

What You Can Safely Do Right Now

Before you panic, here's what you can do at home for minor issues. Always wash your hands thoroughly before and after handling your cat's eyes.

Step 1: Assess the Situation

• Is your cat eating, drinking, and acting normally? If yes, you have more time.
• Is there any discharge? Note the color, consistency, and amount.
• Is your cat squinting? This indicates pain.
• Has there been any trauma? Check for scratches, swelling, or foreign objects.

Step 2: Gentle Cleaning (for mild discharge only)

Do NOT clean the eye if:

• The eye is painful (squinting, pawing)
• There's blood or green/yellow discharge
• The cornea looks cloudy

Safe cleaning method:

1. Use sterile saline solution (contact lens saline, NOT contact lens cleaner)
2. Dampen a clean, lint-free cotton ball or gauze pad
3. Gently wipe from the inner corner (near the nose) outward
4. Use a fresh cotton ball for each eye
5. Never touch the eyeball itself
6. Repeat 2-3 times daily if needed

Step 3: Create a Comfortable Environment

• Dim the lights if your cat seems sensitive to light
• Remove potential irritants (scented candles, air fresheners, cigarette smoke)
• Keep your cat indoors to prevent further irritation or injury
• Prevent rubbing by using an Elizabethan collar (cone) if your cat is pawing at the eye

Step 4: Monitor Closely

Take a photo of the eye every 4-6 hours. This helps your veterinarian see progression. Note:

• Is the discharge increasing or changing color?
• Is the squinting getting worse?
• Is your cat eating and drinking?

What NOT to Do

• NEVER use human eye drops (Visine, artificial tears with preservatives, antibiotic drops)
• NEVER use hydrogen peroxide, alcohol, or vinegar
• NEVER try to remove a foreign object yourself
• NEVER give human pain medication (Tylenol is toxic to cats!)
• NEVER use herbal or essential oil remedies near the eyes

When to Call Your Veterinarian

Call your vet if you notice any of these "yellow light" signs:

• Mild squinting lasting more than 24 hours
• Clear discharge that doesn't improve with cleaning after 2-3 days
• Redness that persists or worsens
• Sneezing along with eye discharge (possible upper respiratory infection)
• Third eyelid partially visible for more than 24 hours
• Your cat is a brachycephalic breed (Persian, Himalayan, Exotic Shorthair), these cats are prone to eye problems and need prompt attention
• Your cat is a senior (over 10 years), eye changes can indicate systemic disease

When to See a Veterinary Ophthalmologist

Some conditions require a specialist. Your general practice vet will refer you if needed:

• Recurrent corneal ulcers that don't heal
• Glaucoma not responding to treatment
• Cataracts requiring surgery
• Retinal disease or sudden blindness
• Uveitis of unknown cause
• Orbital disease (bulging eye)

What Your Vet Will Do

When you bring your cat in for an eye problem, here's what to expect:

The Examination

1. History taking: When did it start? Any trauma? Any other symptoms? Indoor/outdoor? Vaccination status?
2. Distance examination: Observing your cat's behavior, symmetry of eyes, head tilt
3. Schirmer tear test: A small strip of paper placed in the lower eyelid to measure tear production (normal is 15-25 mm/min)
4. Fluorescein stain: A green dye that highlights corneal ulcers or scratches
5. Tonometry: Measuring intraocular pressure (normal is 10-25 mmHg)
6. Ophthalmoscopy: Examining the retina, optic nerve, and blood vessels
7. Pupillary light reflex: Checking neurological function

Common Tests

Expected Costs

• Basic eye exam: $75-150
• Full workup (exam + tests): $200-500
• Specialist consultation: $150-300
• Emergency visit: $150-400
• Surgery (e.g., enucleation, cataract): $1,000-4,000

Pro tip: Pet insurance can be a lifesaver for eye emergencies. Most plans cover diagnostics and treatment for acute conditions.

Common Causes, A Deeper Look

Let me walk you through the most common eye problems I see in practice, from most to least common.

1. Conjunctivitis (Pink Eye)

What it is: Inflammation of the conjunctiva, the pink tissue lining the eyelids and covering the white of the eye.

Causes:

• Feline herpesvirus (FHV-1) : The most common cause, especially in kittens and stressed cats. Up to 80% of cats are latently infected with FHV-1 (Gugjoo, 2024).
• Chlamydia felis: Bacterial infection causing severe conjunctivitis
• Mycoplasma: Another bacterial culprit
• Allergies: Environmental allergens like pollen, dust, mold
• Irritants: Smoke, chemicals, foreign bodies

Signs:

• Red, swollen conjunctiva
• Squinting
• Clear or mucoid discharge
• Sneezing (if viral)

Treatment:

• Viral: Supportive care, L-lysine supplements (controversial but commonly used), topical antiviral drops (e.g., cidofovir, famciclovir)
• Bacterial: Topical antibiotic drops (e.g., terramycin, erythromycin)
• Allergic: Antihistamines, steroid drops (only if no corneal ulcer)

Case example: A 6-month-old kitten from a shelter presents with bilateral squinting, sneezing, and clear discharge. Fluorescein stain is negative. Schirmer tear test is normal. Diagnosis: feline herpesvirus conjunctivitis. Treatment: topical antiviral drops and supportive care. The kitten improves in 5-7 days.

2. Corneal Ulcers

What it is: A break in the cornea's epithelial layer, like a scrape on the eye's surface.

Causes:

• Trauma: Cat fights, scratches from plants, foreign bodies
• Feline herpesvirus: Can cause "dendritic ulcers" (branching patterns)
• Entropion: Eyelid rolling inward, causing eyelashes to rub the cornea
• Dry eye (keratoconjunctivitis sicca) : Insufficient tear production
• Chemical burns: Household cleaners, plants

Signs:

• Severe squinting (blepharospasm)
• Excessive tearing
• Pawing at the eye
• Cloudy cornea (edema)
• Third eyelid elevation

Diagnosis: Fluorescein stain turns the ulcer bright green.

Treatment:

• Simple ulcers: Topical antibiotic drops, pain medication, Elizabethan collar
• Complicated ulcers: Debridement, contact lens, grid keratotomy, surgery
• Indolent ulcers (Boxers, but also seen in cats): Require special treatment

Case example: A 3-year-old indoor-outdoor cat presents with acute squinting and pawing at the right eye. Fluorescein stain reveals a large central ulcer. The owner reports a cat fight 2 days ago. Treatment: topical antibiotic drops every 4 hours, pain medication, and an Elizabethan collar. The ulcer heals in 7 days.

3. Uveitis (Intraocular Inflammation)

What it is: Inflammation inside the eye, affecting the iris, ciliary body, and choroid.

Causes:

• Feline infectious peritonitis (FIP) : A devastating viral disease
• Feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV)
• Toxoplasmosis: A parasitic infection
• Fungal infections: Cryptococcosis, histoplasmosis
• Trauma
• Lens-induced: From cataracts or lens luxation
• Idiopathic: No cause found in up to 50% of cases

Signs:

• Red eye (ciliary flush, redness around the cornea)
• Cloudy anterior chamber (aqueous flare)
• Small, irregular pupil (miosis)
• Low intraocular pressure (hypotony)
• Pain (squinting, photophobia)

Treatment:

• Topical steroids (prednisolone acetate) to reduce inflammation
• Topical atropine to dilate the pupil and reduce pain
• Systemic treatment for underlying cause (antibiotics, antivirals, antifungals)
• Pain medication

Case example: A 5-year-old indoor cat presents with a red, painful left eye. The pupil is small and irregular. Intraocular pressure is 8 mmHg (low). Bloodwork reveals positive FIV status. Diagnosis: FIV-associated uveitis. Treatment: topical steroids and atropine. The eye improves but requires long-term management.

4. Glaucoma

What it is: Increased intraocular pressure (IOP) leading to optic nerve damage and vision loss.

Types:

• Primary: Rare in cats, seen in Burmese and Siamese breeds
• Secondary: More common, caused by uveitis, lens luxation, tumors, or trauma

Signs:

• Pain (squinting, rubbing)
• Cloudy cornea (edema)
• Dilated, fixed pupil
• Enlarged eye (buphthalmos) in chronic cases
• Blindness

Diagnosis: Tonometry shows IOP > 25-30 mmHg.

Treatment:

• Medical: Topical medications to lower IOP (e.g., dorzolamide, timolol, latanoprost)
• Surgical: Cyclophotocoagulation, drainage implants, or enucleation (eye removal) for blind, painful eyes

Case example: A 10-year-old Persian cat presents with a cloudy, enlarged right eye. The owner noticed the cat bumping into furniture. IOP is 45 mmHg. The left eye is normal. Diagnosis: secondary glaucoma due to chronic uveitis. Treatment: topical glaucoma medications. The eye remains blind but comfortable.

5. Cataracts

What it is: Opacification of the lens, causing a white or blue-tinged appearance.

Causes:

• Genetics: Persian, Himalayan, Birman breeds
• Diabetes mellitus: High blood sugar causes lens swelling
• Uveitis: Chronic inflammation damages the lens
• Trauma
• Nutritional: Rare in cats (more common in dogs)
• Age-related: Less common than in dogs

Signs:

• White or blue-tinged pupil
• Vision loss (bumping into things)
• No pain (unless associated with uveitis or glaucoma)

Treatment:

• Surgery: Phacoemulsification (ultrasound removal) with artificial lens implantation
• Medical: No effective medical treatment for cataracts
• Management: Antioxidants (e.g., vitamin C, E) may slow progression but won't reverse

Case example: A 12-year-old diabetic cat presents with sudden vision loss. Both pupils appear white. Blood glucose is 400 mg/dL. Diagnosis: diabetic cataracts. Treatment: insulin therapy to control diabetes. Cataract surgery is discussed but declined due to cost. The cat adapts well to blindness.

6. Dry Eye (Keratoconjunctivitis Sicca)

What it is: Insufficient tear production leading to corneal drying, inflammation, and infection.

Causes:

• Immune-mediated: Most common
• Feline herpesvirus: Can damage tear glands
• Drug-induced: Certain medications (e.g., sulfonamides)
• Neurological: Damage to facial nerve
• Breed predisposition: Brachycephalic breeds

Signs:

• Thick, mucoid discharge
• Red, inflamed conjunctiva
• Dull, dry cornea
• Corneal ulcers
• Squinting

Diagnosis: Schirmer tear test shows < 10 mm/min (normal 15-25).

Treatment:

• Topical cyclosporine (e.g., Optimmune) to stimulate tear production
• Topical tacrolimus (alternative)
• Artificial tears (preservative-free) for lubrication
• Antibiotics for secondary infection
• Surgery (parotid duct transposition) in severe cases

Case example: A 7-year-old Persian cat presents with chronic thick, green discharge from both eyes. Schirmer tear test is 5 mm/min. Diagnosis: dry eye. Treatment: topical cyclosporine twice daily and artificial tears. The cat improves significantly in 4 weeks.

7. Entropion

What it is: Eyelid rolling inward, causing eyelashes to rub against the cornea.

Causes:

• Breed predisposition: Persian, Himalayan, Exotic Shorthair
• Spastic: Secondary to eye pain (e.g., corneal ulcer)
• Age-related: Loose eyelid skin in seniors

Signs:

• Squinting
• Excessive tearing
• Corneal ulcers
• Pawing at the eye

Treatment:

• Temporary: Lubricating eye drops, Elizabethan collar
• Surgical: Eyelid tacking or resection (Hotz-Celsus procedure)

Case example: A 2-year-old Persian cat presents with chronic squinting and tearing. Examination reveals lower eyelid entropion with corneal ulceration. Treatment: surgical correction. The cat recovers well with no further issues.

8. Cherry Eye (Prolapsed Nictitating Membrane Gland)

What it is: Prolapse of the tear gland of the third eyelid, appearing as a red, fleshy mass at the inner corner of the eye.

Causes:

• Genetic predisposition: Burmese, Persian, Himalayan breeds
• Weak connective tissue

Signs:

• Red, round mass at inner corner of eye
• May be unilateral or bilateral
• Usually not painful unless dry or infected

Treatment:

• Surgical replacement: Tacking the gland back into place
• Removal: Only if gland is severely damaged (may cause dry eye)

Case example: A 1-year-old Burmese cat presents with a red mass at the inner corner of the left eye. Diagnosis: cherry eye. Treatment: surgical replacement. The cat recovers well.

9. Horner's Syndrome

What it is: A neurological condition affecting the sympathetic nerve supply to the eye.

Causes:

• Middle ear infection (otitis media)
• Trauma (head, neck, chest)
• Tumors (chest, neck)
• Idiopathic (no cause found)

Signs:

• Small pupil (miosis)
• Third eyelid elevation
• Droopy upper eyelid (ptosis)
• Sunken eye (enophthalmos)

Treatment:

• Treat underlying cause (antibiotics for ear infection, surgery for tumor)
• Supportive care (artificial tears if third eyelid covers the eye)
• Spontaneous resolution in many cases

Case example: A 4-year-old cat presents with a small pupil, elevated third eyelid, and droopy eyelid on the right side. Ear examination reveals a middle ear infection. Treatment: antibiotics for 4 weeks. The Horner's syndrome resolves.

10. Retinal Disease

What it is: Damage to the retina, the light-sensitive tissue at the back of the eye.

Causes:

• Hypertension: High blood pressure (common in older cats with kidney disease or hyperthyroidism)
• Feline infectious peritonitis (FIP)
• Toxoplasmosis
• Feline leukemia virus (FeLV)
• Nutritional: Taurine deficiency (rare now with commercial diets)
• Genetic: Progressive retinal atrophy (PRA) in Abyssinian, Somali breeds

Signs:

• Sudden blindness (bumping into things)
• Dilated, non-responsive pupils
• Retinal detachment (visible on ophthalmoscopy)
• Retinal hemorrhage (bleeding)

Treatment:

• Hypertension: Blood pressure medication (amlodipine)
• Underlying disease: Treat FIP, toxoplasmosis, FeLV
• Taurine supplementation: If deficient
• No treatment: For genetic PRA

Case example: A 14-year-old cat with chronic kidney disease presents with sudden blindness. Blood pressure is 220 mmHg (normal < 160). Fundic examination reveals retinal detachment and hemorrhage. Diagnosis: hypertensive retinopathy. Treatment: amlodipine to lower blood pressure. Vision partially returns in 2 weeks.

Why Do Cats' Eyes Glow in the Dark?

This is one of the most fascinating features of feline vision, and one of the most common questions I get from cat owners.

The Tapetum Lucidum

Cats have a specialized reflective layer behind their retina called the tapetum lucidum (Latin for "bright tapestry"). This structure acts like a mirror, reflecting light that passes through the retina back through the photoreceptor cells. This gives the photoreceptors a second chance to capture light, effectively doubling the cat's ability to see in low light conditions.

Why the Color Varies

The color of the "eye shine" varies depending on:

• Breed: Siamese cats often have blue eyes with a red glow; most cats have green, yellow, or blue-green glow
• Age: Kittens may have a different color than adults
• Genetics: The amount of zinc or riboflavin in the tapetum affects the color
• Health: Changes in eye shine color can indicate disease (e.g., a red glow may indicate retinal disease)

Why It's Important

The tapetum lucidum is why cats can see in light that's 6 times dimmer than what humans need. However, this adaptation comes at a cost: cats have poorer visual acuity and color vision than humans. They see the world in shades of blue and green, with less detail than we do.

When to Worry About Eye Glow

• Absent glow: May indicate retinal disease or cataract
• Abnormal color: A red glow in a cat that normally has green may indicate retinal hemorrhage
• Asymmetry: One eye glows differently than the other, could indicate disease

How to Clean Cat Eye Discharge Safely

Cleaning your cat's eyes is an important part of preventive care, especially for brachycephalic breeds. Here's how to do it safely.

When to Clean

• Daily: For breeds prone to tear staining (Persian, Himalayan)
• As needed: When you notice discharge
• Before and after: Any eye medication

Supplies You'll Need

• Sterile saline solution (contact lens saline, NOT contact lens cleaner)
• Lint-free cotton balls or gauze pads
• Clean towel to wrap your cat (if needed)
• Treats for positive reinforcement

Step-by-Step Guide

1. Prepare your cat: Choose a calm time. Wrap your cat in a towel if needed (the "purrito" technique).
2. Wash your hands: Thoroughly with soap and water.
3. Dampen the cotton ball: With sterile saline. Never use tap water, it can contain bacteria and minerals.
4. Wipe from inner to outer corner: Start at the nose and wipe outward. This prevents debris from entering the tear duct.
5. Use a fresh cotton ball for each eye: Never use the same cotton ball for both eyes, this can spread infection.
6. Be gentle: Never scrub or apply pressure. Let the saline soften any crusted discharge.
7. Dry the area: Use a dry cotton ball to gently pat the area dry.
8. Reward your cat: Give treats and praise.

What to Avoid

• Human eye makeup remover: Contains chemicals that irritate cat eyes
• Baby wipes: May contain alcohol, fragrances, or preservatives
• Hydrogen peroxide: Damages tissue
• Vinegar: Too acidic
• Essential oils: Toxic to cats
• Cotton swabs (Q-tips) : Risk of corneal injury

When Cleaning Isn't Enough

If you're cleaning your cat's eyes daily and still seeing:

• Thick, colored discharge (yellow, green, brown)
• Redness or swelling
• Squinting or pain
• Third eyelid showing

...it's time to see your veterinarian.

Prevention: Long-Term Strategies

Preventing eye problems is always better than treating them. Here's how to keep your cat's eyes healthy for life.

1. Regular Veterinary Checkups

• Annual exams: Include thorough eye examination
• Senior cats (over 10 years) : Twice-yearly exams with blood pressure screening
• Brachycephalic breeds: More frequent exams due to anatomical predisposition

2. Vaccination

• Feline herpesvirus (FHV-1) : Core vaccine (part of FVRCP)
• Feline calicivirus: Core vaccine
• Feline leukemia virus (FeLV) : Recommended for outdoor cats

3. Nutrition

• Complete and balanced diet: Commercial cat foods are formulated with adequate taurine
• Omega-3 fatty acids: May support tear production and reduce inflammation
• Antioxidants: Vitamin C, E, and beta-carotene may support eye health

4. Environmental Management

• Reduce stress: Stress triggers FHV-1 flare-ups
• Air quality: Avoid smoke, strong fragrances, and dusty environments
• Humidity: Dry air can worsen dry eye
• Safe plants: Remove toxic plants (lilies are deadly to cats)

5. Grooming

• Facial hair: Keep hair around eyes trimmed (especially in Persians)
• Tear stains: Clean daily to prevent skin irritation
• Nail trimming: Prevents self-trauma from scratching

6. Indoor vs. Outdoor

• Indoor cats: Lower risk of trauma, infection, and parasites
• Outdoor cats: Higher risk of cat fights, foreign bodies, and infectious diseases

7. Breed-Specific Care

8. Monitor at Home

• Weekly: Check eyes for redness, discharge, or cloudiness
• Monthly: Check vision by moving a toy or laser pointer
• Seasonally: Watch for allergy symptoms

Frequently Asked Questions

1. Why do my cat's eyes water all the time?

Excessive tearing (epiphora) can be caused by:

• Blocked tear ducts: Common in brachycephalic breeds
• Allergies: Environmental allergens
• Conjunctivitis: Viral or bacterial
• Entropion: Eyelashes rubbing the cornea
• Dry eye: Paradoxically, dry eyes can cause reflex tearing

If your cat's eyes are constantly watery, see your veterinarian to determine the cause.

2. Can cats get pink eye from humans?

No. The viruses and bacteria that cause conjunctivitis in humans are species-specific. However, cats can transmit Chlamydia felis to humans (rare, causes mild conjunctivitis). Practice good hygiene: wash hands after handling your cat's eyes.

3. Why is my cat's third eyelid showing?

The third eyelid (nictitating membrane) is normally hidden. When it's visible, it can indicate:

• Pain: Any eye pain causes third eyelid elevation
• Dehydration: Systemic illness
• Horner's syndrome: Neurological issue
• Haw's syndrome: Bilateral third eyelid elevation with diarrhea (usually self-limiting)
• Systemic illness: Fever, infection

If the third eyelid is showing for more than 24 hours, see your veterinarian.

4. How do I know if my cat is blind?

Signs of vision loss include:

• Bumping into furniture or walls
• Difficulty finding food bowl or litter box
• Startling easily
• Reluctance to jump or climb
• Dilated, non-responsive pupils
• Cloudy or white appearance to the eyes

If you suspect blindness, see your veterinarian immediately. Some causes (like hypertension) are reversible if caught early.

5. What does it mean when my cat's pupils are different sizes?

Anisocoria (unequal pupil size) is always a red flag. Causes include:

• Uveitis: The inflamed eye has a small pupil
• Glaucoma: The affected eye has a dilated pupil
• Horner's syndrome: The affected eye has a small pupil
• Iris atrophy: Age-related change (usually benign)
• Neurological disease: Brain or nerve damage

This requires immediate veterinary attention.

6. Can I use human eye drops on my cat?

No. Never use human eye drops on your cat. Many contain:

• Preservatives (benzalkonium chloride) that are toxic to cats
• Decongestants (tetrahydrozoline) that can cause serious side effects
• Steroids that can worsen corneal ulcers
• Antibiotics that may not be effective for feline infections

Only use products specifically prescribed by your veterinarian.

7. Why does my cat have brown tear stains?

Brown tear stains are caused by porphyrins, iron-containing pigments in tears. When tears overflow onto the fur, the porphyrins oxidize and turn brown. This is:

• Normal in brachycephalic breeds
• Worse with blocked tear ducts or excessive tearing
• Not harmful but can cause skin irritation

Management includes daily cleaning, keeping facial hair trimmed, and addressing underlying causes of excessive tearing.

8. How much does cat eye surgery cost?

Costs vary widely by location and complexity:

• Cherry eye repair: $300-800
• Entropion correction: $400-1,200
• Enucleation (eye removal) : $800-2,000
• Cataract surgery: $2,000-4,000
• Glaucoma surgery: $1,000-3,000

Pet insurance can help cover these costs. Always get a written estimate before proceeding.

References

1. Gugjoo, M.B. (2024). Stem Cell-Based Regenerative Medicine in Canine Practice. Stem Cell Based Regenerative Medicine in Canine Practice. DOI: 10.1002/9781394253289

2. Voysey, I. (2024). The Prevalence and Potential Problem of Cuteness in Zoomorphic Robots. ACM Transactions on Human Robot Interaction. DOI: 10.1145/3767724

3. Sabnis, R.W. (2007). Handbook of Acid-Base Indicators (pH Indicators). Handbook of Acid Base Indicators Ph Indicators. DOI: 10.1201/9781315270715

4. Dalrymple, A.N. (2025). Overcoming failure: improving acceptance and success of implanted neural interfaces. Bioelectronic Medicine. DOI: 10.1186/s42234-025-00168-7

5. D'Vincent, E. (2024). Captive Ambassadors: The Hidden Lives of Zoo Animals. Human Animal Studies.

6. American Veterinary Medical Association (AVMA). Feline Ophthalmology Guidelines. Available at: avma.org

7. American Animal Hospital Association (AAHA). Canine and Feline Eye Disease Management. Available at: aaha.org

8. World Small Animal Veterinary Association (WSAVA). Ocular Disease in Cats. Available at: wsava.org

9. Merck Veterinary Manual. Ocular Disorders of Cats. Available at: merckvetmanual.com

10. PubMed. Feline Herpesvirus-1: A Review of Current Knowledge. Available at: pubmed.ncbi.nlm.nih.gov

This guide is for informational purposes only and does not replace professional veterinary advice. If your cat is showing signs of eye pain or vision loss, please consult your veterinarian immediately.