Why is My Cat’s Eye Red?

You notice your cat blinking more than usual or maybe one eye suddenly looks red, irritated, or swollen. It’s easy to worry when something doesn’t look right, especially when it involves your cat’s vision. If you’ve found yourself asking, “Why is my cat’s eye red?”, this change in appearance can mean several things, ranging from a mild irritation to something more serious. The team at Parrish Veterinary Clinic & Urgent Care is here to guide you through possible reasons behind red eyes in cats, what symptoms to look for, and when it’s time to schedule a veterinary visit. Keep reading to find out what that redness could mean and how you can support your cat’s comfort and health. 

What Causes Red Eyes in Cats?

When a pet parent asks, “Why is my cat’s eye red?” there isn’t a one-size-fits-all answer. Redness can stem from irritation, infection, injury, or even underlying health issues. The color change often comes from inflammation of the conjunctiva (conjunctivitis) or blood vessel dilation in the eye tissues. Let’s look at the most common causes of red eyes in cats and how each can affect your pet’s comfort and vision.

Conjunctivitis (Pink Eye)

Pink eye or conjunctivitis involves inflammation of the thin membrane that lines the inside of the eyelids and part of the eyeball. Conjunctivitis may affect one or both eyes. It can be caused by viruses (like feline herpesvirus), bacteria, allergens, or irritants such as dust or chemicals. Symptoms often include eye discharge, squinting, and frequent blinking. If your cat is pawing at their eye or avoiding light, this may also point to conjunctivitis.

Corneal Injuries

Cats are curious, which puts their eyes at risk of injury. Scratches to the cornea (the clear outer layer of the eye) can occur during play, fights, or encounters with plants and debris. A corneal scratch or ulcer can lead to visible redness, increased tearing, and squinting. If left untreated, these injuries can worsen and lead to permanent damage.

Eye Infections

Bacterial or viral infections can trigger inflammation and redness. Cats with upper respiratory infections often develop red eyes along with sneezing, nasal discharge, and lethargy. These infections may originate from feline herpesvirus, calicivirus, or chlamydia. While some infections are mild, others may lead to long-term discomfort if not addressed. If your cat has both red eyes and respiratory signs, it’s important to reach out to your veterinarian promptly.

Eye Redness Caused by Other Medical Conditions

Not all red eyes result from external irritants or infections. Some underlying health problems can cause inflammation that appears as redness in the eye.

Glaucoma

Glaucoma occurs when pressure builds inside the eye, damaging the optic nerve and causing pain. Redness is often one of the first signs pet owners notice, followed by cloudiness in the eye, dilated pupils, and vision loss. Glaucoma is a serious condition that requires urgent care to prevent blindness.

Uveitis

Uveitis is inflammation of the middle structures of the eye and can be caused by trauma, infection, immune disorders, or systemic illness. The condition can appear suddenly and is often painful. Along with redness, cats with uveitis may show signs of squinting, tearing, light sensitivity, or color change in the iris.

Dry Eye (Keratoconjunctivitis Sicca)

Though less common in cats than in dogs, dry eye can still affect some felines. In this condition, the eye doesn’t produce enough tears to stay properly lubricated, leading to inflammation, redness, and a thick, sticky discharge.

Other Symptoms That May Appear with Red Eyes

Redness is often just one part of the picture. If you’re asking, “Why is my cat’s eye red?” it helps to also take note of any additional symptoms. These clues can help your veterinarian determine the underlying issue.

• Discharge: Clear, yellow, green, or brown discharge can signal different types of infections or irritations.
• Swelling: Puffy eyelids or a bulging eye may suggest trauma, abscess, or glaucoma.
• Squinting or blinking more than usual: These are often signs of pain or discomfort.
• Third eyelid showing: If the inner eyelid is partially covering the eye, this can be a response to irritation or illness.
• Behavior changes: Hiding, reduced appetite, or excessive grooming may indicate that your cat isn’t feeling well.

By watching for changes and reporting all symptoms to your veterinarian, you give your cat the best chance of timely care.

When to Seek Veterinary Attention

While some minor irritations can improve on their own, it’s better not to wait when it comes to your cat’s eyes. Eye problems can escalate quickly and may result in long-term damage if left untreated. If your cat’s eye looks red for more than a day, or if you see signs of discharge, squinting, or behavior changes, it’s time to contact your veterinarian. Redness that develops suddenly or worsens quickly should be evaluated as soon as possible.

At Parrish Veterinary Clinic & Urgent Care, we can examine your cat’s eye thoroughly and perform the necessary tests to find the cause. We’ll guide you on the next steps so your cat can start feeling better quickly. Call (941) 216-2335 today or request an appointment online.

What Not to Do if Your Cat’s Eye is Red

When faced with the question “Why is my cat’s eye red?” it’s natural to want to help right away. However, some well-meaning actions can actually make the problem worse.

• Do not use human eye drops unless directed by your veterinarian. Some products may be harmful to cats.
• Avoid touching or rubbing the eye, even if your cat allows it. This can cause more irritation.
• Don’t assume it’s a minor issue. While some causes of red eye are simple, others can be serious.

Always reach out to your veterinarian for proper evaluation and care.

How Parrish Veterinary Clinic & Urgent Care Can Help

If you’re wondering “Why is my cat’s eye red?” and not sure what to do next, we’re here to help. At Parrish Veterinary Clinic & Urgent Care, we provide same-day and urgent care appointments to evaluate your cat’s eye health. Whether it’s a minor irritation or something more serious, our experienced team can offer the support your cat needs. We use diagnostic tools to examine the eye, identify potential infections or injuries, and recommend the best course of action. Our goal is to relieve your cat’s discomfort and protect their long-term vision. If your cat’s eye looks red, don’t wait. Call (941) 216-2335 or request an appointment online today. We’re located in Parrish, FL and proudly serve cats and their families throughout the area.