Your cat keeps squinting on one side, and when you look closely, the lower lid seems to be folding slightly inward toward the eye rather than sitting flat against it. It doesn't look like a typical infection no thick discharge, no obvious redness spreading across the whole eye just a persistent, localised irritation that doesn't clear up. This is often exactly what an eyelid structural problem looks like, and it's a genuinely different category of issue from a straightforward eye infection.

Eyelid problems in cats including entropion (lids turning inward), ectropion (lids turning outward), lagophthalmos (being unable to fully close the eye), and third eyelid abnormalities can be present from birth or develop later from injury, scarring, or body-wide disease, and they often need a genuinely different treatment approach than a simple eye infection would. These conditions can look deceptively minor at first, but left unaddressed, several of them can cause real, ongoing damage to the surface of the eye. Understanding what each one actually looks like helps you know when "just watching it" isn't the safest option.

Key Takeaways

• Entropion (eyelids turning inward) causes eyelashes and fur to rub against the eye's surface, and it's seen more often in Persian cats and other flat-faced breeds.
• Ectropion (eyelids turning outward) leaves the inner eyelid surface exposed to irritants, often leading to chronic conjunctivitis.
• Lagophthalmos — being unable to fully close the eyelids is linked to shallow eye sockets, common in flat-faced breeds, and puts the cornea at ongoing risk of drying out.
• Rare eyelash abnormalities and a birth defect called a coloboma (a cleft in the eyelid) can also affect how well the eyelid protects the eye.
• The third eyelid can become visibly raised for many reasons some as simple as sleepiness, others pointing to genuine eye disease or even a body-wide illness.
• Blepharitis (eyelid inflammation) can be a purely local problem or a sign of a broader skin or immune-system condition needing whole-body treatment.

Why Do Eyelid Problems Matter So Much for Eye Health?

Problems affecting the eyelids may be congenital, present at birth, or may occur as a result of injury, infection, disease of the surrounding skin, body-wide diseases, or exposure to various types of irritants, according to the Merck Veterinary Manual. This broad range of possible causes is genuinely worth understanding upfront, because it explains why an eyelid problem so often needs more than a simple antibiotic drop to actually resolve the eyelid itself, not just the eye's surface, is frequently the real source of the problem.

What Is Entropion in Cats?

Entropion is the turning in of the edges of the eyelid, so that the eyelashes rub directly against the eye's surface. It occurs more often in Persian cats and other breeds with shortened, flattened heads, though it can also develop because of scarring of the eyelids, or from excessive blinking caused by pain in the eye or surrounding area.

The turning in of eyelashes or facial hairs causes ongoing discomfort and irritation to the conjunctiva and cornea, and long-lasting entropion can genuinely cause scarring, abnormal colouring, and the formation of slow-healing sores on the cornea itself. Here's a genuinely useful detail, though: early spasms of entropion may be reversible if the underlying cause is removed or the source of pain is lessened which is exactly why catching this early, rather than waiting to see if it settles, meaningfully changes the outlook.

How Is Entropion Treated?

For early cases, a few approaches exist: turning the lid hairs back away from the eye with temporary stitches in the lid, injecting medication into the lid close to the area that's turning in, or using local anaesthetic to block the nerves in the eyelid. But once entropion is genuinely established rather than an early, reversible spasm, surgery is usually required to correct the underlying structural defect properly.

What Is Ectropion in Cats?

Ectropion is essentially the opposite problem: a slack eyelid edge that's turned outward, usually with a large, visible notch in the eyelid. Scars in the eyelid or facial nerve paralysis may produce ectropion affecting just one eyelid.

The consequence here is different from entropion's mechanical rubbing with ectropion, the conjunctiva is left exposed to environmental irritants, and this exposure, combined with secondary bacterial infection, can result in long-term or recurring conjunctivitis. Topical antibiotics may control the infection temporarily, but surgical lid-shortening procedures are often genuinely necessary to resolve the underlying problem. For milder cases, repeated, periodic cleansing of the affected eyelid with mild decongestant solutions can help manage things though following your vet's specific treatment program closely genuinely matters here, since half-measures tend to let the underlying irritation and infection cycle continue.

What Is Lagophthalmos?

Lagophthalmos is the inability to fully close the eyelids, which leaves the cornea inadequately protected from drying out and from everyday trauma. It may result from extremely shallow eye sockets a common feature in breeds with short, broad, flattened heads, such as Persians and it shares many of the same downstream risks as entropion: scarring, abnormal colouring, and slow-healing corneal sores are all common complications of this condition specifically.

Excessive nasal skin folds and facial hair can actually make the damage from lagophthalmos worse, adding further irritation on top of the eye's already-reduced protection. Unless the underlying structural cause can genuinely be corrected, treatment involves frequent use of lubricating ointments to keep the cornea protected, alongside surgical shortening or closure of the corners of the eye, either temporarily or permanently, depending on severity.

Can Cats Have Eyelash Problems?

Yes, though the Merck Veterinary Manual notes these abnormalities extra eyelashes or misdirected eyelashes along the lid edge are genuinely rare in cats compared to some other conditions. When present, they can cause watering eyes, the development of blood vessels growing into the cornea, and slow-healing sores and scarring. Many irregular eyelashes are actually very fine and don't cause any real irritation at all but eyelashes that point backward toward the eye specifically can cause profound pain, and if they're damaging the cornea or conjunctiva, surgical removal or freezing of the eyelash follicles may be necessary.

What Is a Coloboma?

Occasionally, kittens are born with a developmental deformity of the upper eyelid called a coloboma, which appears as a visible cleft or gap in the eyelid itself. The defective eyelid often can't function properly as a result, leaving the eye genuinely exposed and at risk of inflammation and ulcer formation unless it's surgically repaired.

What Causes the Third Eyelid to Show in Cats?

The third eyelid, or nictitating membrane, normally stays tucked out of sight in a healthy cat, and a visibly raised third eyelid is one of the more genuinely useful early warning signs in feline eye health precisely because it can mean quite a few different things, ranging from harmless to genuinely significant.

A healthy cat's third eyelid may be briefly, temporarily raised when they're sleepy or recovering from anaesthesia nothing to worry about in that specific context. But a third eyelid that stays elevated can also result from eye injuries, such as corneal ulceration or a foreign body caught in the eye, from viral infections, neurological disorders, or from a prolapsed nictitans gland a condition sometimes called "cherry eye," similar in concept to the more commonly discussed dog version, though genuinely less common in cats overall.

What Is Haws Syndrome?

This is a genuinely interesting and somewhat unusual pattern worth knowing. Haws syndrome refers to elevation of the third eyelid in both eyes simultaneously, and notably it isn't associated with a disease inside the eyeball or the eye socket itself. In some documented cases, elevated third eyelids have appeared alongside gastrointestinal illness, resolving once the underlying digestive problem cleared. This is a genuinely useful example of why a raised third eyelid deserves a full veterinary assessment rather than being treated as a purely local eye issue the actual cause can sit somewhere else in the body entirely.

When Should You Worry About a Raised Third Eyelid?

If your cat's third eyelid is consistently raised, rather than briefly visible after waking or during a moment of sleepiness, it's worth seeking veterinary attention rather than waiting it out. Since the underlying cause can range from a simple corneal scratch to a body-wide illness, a proper exam is genuinely the only reliable way to know which situation you're actually dealing with.

What Is Blepharitis in Cats?

Blepharitis inflammation of the eyelids can result from the spread of generalised skin inflammation, inflammation of the conjunctiva, local glandular infections, or irritants such as plant oils or sunlight. Fungi, mites, or bacteria can infect the eyelids directly too, and this can then progress into a more generalised inflammation affecting a larger area.

Some cases connect to genuinely serious underlying conditions. Lesions of immune-mediated diseases can occur specifically where the skin and conjunctiva meet, and pemphigus is one example a disease causing large blisters on the skin and mucous membranes, often accompanied by itching or burning sensations, and needing skin scrapings, cultures, or biopsies for accurate diagnosis. Localised glandular infections, by contrast, can be as simple and short-term as a stye, or more persistent, like a Meibomian abscess.

How Is Blepharitis Treated?

When eyelid inflammation is caused by a generalised, body-wide condition, whole-body therapy is often necessary alongside treatment of the eye itself treating the eye alone in these cases genuinely won't resolve the underlying driver. Supportive care with hot packing and frequent cleansing using a warm washcloth is often used in more severe cases. Because these treatment programs can involve several different medications working together, it's genuinely worth asking your vet for detailed instructions on any eye drops or other medication you'll need to administer at home, and asking for a demonstration if you're not confident about the technique.

Caring for a Cat With Eyelid Problems

• Don't assume every squinty, watery eye is a simple infection. As covered throughout, several eyelid structural problems look deceptively like an ordinary eye issue at first glance.
• If your cat is a Persian or another flat-faced breed, familiarise yourself with entropion and lagophthalmos specifically, since these breeds are meaningfully more prone to both.
• Catch entropion early if you can. Early spasms are genuinely more reversible than established, long-standing cases — a prompt vet visit at the first sign of squinting or persistent one-sided irritation matters here.
• Follow eyelid treatment programs exactly as prescribed, including any lubricating ointments, since these are often protecting the cornea from damage while the underlying structural issue is addressed.
• Watch the third eyelid, not just the main eye. A consistently raised third eyelid deserves proper investigation, since the cause can range from a local eye problem to something happening elsewhere in the body entirely.
• If your cat's cherry eye or third eyelid gland is involved, our guide on cherry eye in dogs explains the broader principles of third eyelid gland prolapse and why preserving rather than removing the gland matters, even though it's written with dogs specifically in mind.
• Understand your cat's baseline eye anatomy. Our guide on how a cat's eye works covers the third eyelid's normal protective role in more depth.
• Never self-treat an eyelid problem at home. Our guide on human medicines and pets explains why household remedies can genuinely worsen a sensitive eyelid condition.
• Watch the wider picture. Our guide on 10 signs your pet is sick is a useful general checklist alongside anything eyelid-specific.

FAQ

Can entropion in cats resolve without surgery?
Sometimes, if it's caught early. The Merck Veterinary Manual notes that early spasms of entropion may be reversed if the underlying cause is removed or pain is lessened, sometimes with temporary stitches or medication. Once entropion becomes established, though, surgery is usually needed to correct it properly.

Is a raised third eyelid always serious in cats?
Not always it can be briefly normal when a cat is sleepy or waking from anaesthesia. But a consistently raised third eyelid can point to anything from a corneal injury to a body-wide illness like the gastrointestinal cases seen in Haws syndrome, so it's genuinely worth a vet visit if it doesn't resolve quickly on its own.

Are flat-faced cat breeds more prone to eyelid problems generally?
Yes Persians and other breeds with shortened, flattened heads are specifically noted as more prone to both entropion and lagophthalmos, largely due to their facial and orbital structure. If you share your home with one of these breeds, it's worth knowing the early signs of both conditions.

Can eyelid problems in cats be prevented?
Not always, particularly congenital or breed-related structural issues, which are present from birth. However, catching early signs persistent squinting, one-sided irritation, or a consistently raised third eyelid and getting them assessed promptly genuinely improves outcomes and can prevent more invasive treatment later.

Is eyelid inflammation (blepharitis) contagious to other pets?
It depends entirely on the underlying cause. If a fungal, mite, or bacterial infection is driving the inflammation, it may potentially spread to other pets in close contact; if it's linked to an immune-mediated disease like pemphigus, it generally isn't contagious at all. Your vet's diagnosis will clarify which situation applies.

References

1. Gelatt, Kirk N. Disorders of the Eyelids in Cats. Merck Veterinary Manual, Pet Owner Version.
2. McGowan, Kate. Haws Syndrome in Cats. Veterinary Partner, VIN.