It is therefore an abnormal eyelid position rather than simply eye inflammation. It may affect one or both eyes and only part of the eyelid margin. Treatment planning establishes whether the problem is structural or worsened by pain from another eye disease.
When to see a vet urgently
Contact a vet promptly if you notice any of these changes:
- your cat keeps the eye closed or rubs it repeatedly;
- the clear surface of the eye becomes cloudy or develops a brown or dark area;
- your cat seems to see less well or eye pain suddenly increases.
You can find a vet near you.
Overview
Normally, the eyelid protects the eye from outside influences. In entropion, the lid margin rolls inwards and eyelashes and hairs touch the cornea. This causes constant mechanical irritation, pain and inflammation. Without treatment, the condition leads to keratitis, corneal ulcers and even sight loss.
The cornea is the transparent surface at the front of the eye. It protects the internal structures and helps focus light correctly. Surface damage can be painful even if it looks small to you. Not every case of entropion leads to blindness, but constant rubbing can cause damage whose severity cannot be judged at home.
Causes
The main causes of entropion in cats include:
- a congenital abnormality of eyelid structure, more often in Persians and British Shorthairs;
- eyelid injuries and scarring;
- chronic blepharitis, or eyelid inflammation;
- loss of skin elasticity in older cats;
- eyelid spasms associated with eye pain, causing secondary entropion.
In structural entropion, the shape of the eyelid itself directs hairs towards the eye. In the secondary form, the original problem may lie elsewhere: a painful cornea, for example, makes a cat squeeze the eyelids tightly. This can turn the lid inwards. Scarring may later make an initially pain-related change more permanent.
A cycle can develop in which pain worsens the abnormal lid position and rubbing increases pain. The examination therefore assesses both eyelid position and the condition of the cornea and other eye structures. Correcting the lid alone is not always enough if inflammation or an ulcer also needs treatment.
Risk factors
Cats predisposed to inward-turning eyelids include:
- flat-faced breeds, including Persians, British Shorthairs and Exotics;
- older animals;
- cats with chronic eye disease;
- cats that have had eyelid injuries or inflammation.
Information on feline risk factors and differences between breeds is limited, and the list does not cover every possible patient. Entropion also occurs in Maine Coons, for example. The precise inheritance pattern of the inherited form is not fully understood. Symptoms beginning in adulthood should not automatically be interpreted as a congenital defect either.
Main symptoms
Entropion may be suspected from the following symptoms:
- constant watering;
- red eyes;
- light sensitivity, with squinting or hiding from light;
- blepharospasm, involving frequent blinking and squinting;
- corneal cloudiness or ulcers;
- eye discharge containing mucus or pus;
- impaired sight.
A watery eye does not always mean that the tear duct is blocked. With entropion, irritation of the eye surface can increase tear production. Moisture may collect around the eyelids, and your cat may rub the eye with a paw or rub their face against objects. Rubbing can worsen damage to the eye surface.
Other eye diseases cause similar symptoms. Conjunctivitis, a corneal ulcer and inflammation within the eye, for example, can cause squinting and discharge. A visibly inward-turned eyelid must therefore be examined as part of the whole eye's condition. Discharge alone does not determine which medication or procedure is needed.
Complications and consequences
Without treatment, entropion leads to:
- chronic conjunctivitis;
- keratitis and corneal ulcers;
- pain and reduced quality of life;
- corneal cloudiness and blindness.
In cats, prolonged corneal irritation may also be associated with a corneal sequestrum. This is damaged, dead corneal tissue that may appear as an amber, brown or black area. A dark patch is therefore not necessarily dirt on the eye. It may require a corneal procedure separate from eyelid surgery.
A severe ulcer or sequestrum can extend deeper into the cornea and weaken it. Perforation may then become a risk. The list of consequences does not mean that every cat with entropion will lose sight. The prognosis is particularly affected by how much corneal damage has already occurred and whether the rubbing can be stopped.
Diagnosis at the vet
Diagnosis is based on:
- an ophthalmic examination;
- assessment of the cornea using a fluorescein test;
- ruling out other eye diseases.
Distinguishing eyelid position from eye pain
The vet examines the eyelid margin, blinking and which hairs touch the eye surface. Lid position is assessed while your cat is awake because muscle tension affects its shape. Findings may be compared before and after local anaesthetic. If squeezing caused by pain eases, it becomes clearer how much of the abnormal position is related to eyelid structure.
Fluorescein dye helps identify corneal surface damage by adhering where the protective surface layer is missing. Tear production and eye pressure may also be assessed, and other painful diseases sought. The extent of eyelid surgery is not decided solely on how the eye looks during marked squinting.
Treatment and recovery
Permanent structural entropion is usually corrected surgically by changing eyelid position. The technique is chosen according to the location and extent of the problem, your cat's age and eyelid function. The aim is to keep hairs away from the cornea while preserving protective blinking. Several corrective techniques may be combined if needed.
If inward rolling is mainly caused by spasms from eye pain, the cause of pain is treated first. Sutures may temporarily hold the lid outwards. Once corneal disease settles, permanent eyelid surgery may no longer be needed. Eye drops may form part of treatment for an underlying disease or ulcer, but they do not on their own change a permanent structural eyelid defect.
In a mild case in a growing cat, the timing of definitive surgery is considered individually. A mild change can sometimes be monitored or managed temporarily if there is no immediate danger to the cornea. A sight-threatening change still needs prompt care in a kitten. Do not wait for growth to finish without a veterinary assessment.
Surgical results are often good, but another correction is sometimes needed. A study of lower eyelid entropion surgery in 124 cats found that most eyes were corrected with one procedure, while some needed a second operation. The study involved particular surgical techniques and cats selected for treatment, so it does not guarantee the same result for every patient.
The other eye is also monitored even if the original problem affected only one side. In the same study, some cats initially affected on one side later developed entropion in the other eye. New squinting or watering therefore does not always mean that the first operation has failed.
At home, prevent rubbing according to your vet's instructions. A cat with corneal damage may need a protective collar while healing. Contact the practice again if pain, cloudiness or discharge increases. The cornea and eyelid still need checking even when the eye already looks calmer from outside.
If eye drops are prescribed for home care, wash your hands before and after giving them. Keep the bottle tip clean and do not let it touch the eye, eyelids or other surfaces. Calm handling and, if needed, gentle help from another person make giving medicine to a painful eye easier. Follow the instructions specifically given for your cat. If you cannot give the medicine or the eye looks redder and more irritated afterwards, contact your vet before continuing treatment.
Prevention
There is no specific prevention for entropion, but the risk of complications can be reduced through:
- regular eye checks for breeds predisposed to the condition;
- prompt treatment of eyelid and eye inflammation;
- protecting your pet from injuries;
- consulting a vet as soon as signs of eye irritation appear.
What it means for owners
Entropion in cats is painful and cannot be ignored. Owners should remember that constant watering, squinting and red eyes are reasons to seek prompt assessment by a veterinary ophthalmologist. In most cases, entropion is treated surgically, and timely intervention restores eye health completely.
Complete recovery cannot be promised, however, if permanent corneal scarring or other serious damage has already developed. Successful eyelid correction removes the cause of rubbing, but previous damage may continue to affect sight.
Frequently asked questions
Can eye drops alone cure entropion?
If the rolling is mainly associated with pain from another eye disease, treating that disease may reduce it. A permanent structural abnormality often needs a procedure, however. Treatment is chosen only after the eyelid and cornea have been examined.
Does a kitten need surgery immediately?
The timing depends on the severity of the change and whether the eyelid is damaging the cornea. Temporary correction may be considered in a mild case, but sight-threatening damage is not left waiting for growth. The decision is based on an eye examination.
Can the other eye become affected later?
Yes. Entropion beginning on one side does not guarantee that the other eye will remain symptom-free. Watch whether both eyes are held open normally, whether they water and whether your cat rubs them. A new symptom needs investigation even if the previously affected eye has healed well.
This article is for general information only and is not a guide to treatment. If you notice the first signs of illness, contact your vet.
Paw4care editorial team
Sources
- Eyelids in Animals, Merck Veterinary Manual, accessed 2026-11-02.
- Entropium, Ludwig-Maximilians-Universität München, accessed 2026-11-02.
- Entropion, American College of Veterinary Ophthalmologists, accessed 2026-11-02.
- Surgical management and outcome of lower eyelid entropion in 124 cats, Veterinary Ophthalmology / PubMed, accessed 2026-11-02.
- Common eye conditions in cats – clinical tips (Part 2), British Small Animal Veterinary Association, accessed 2026-11-02.
- Corneal Ulcers, Cornell University College of Veterinary Medicine, accessed 2026-11-02.
- Applying Eye Drops to Cats, VCA Animal Hospitals, accessed 2026-11-02.