By Dr Duncan Houston
A dog that repeatedly squints or tears may have an eyelid rubbing against the eye. Entropion is an inward turn of the eyelid, and the resulting friction can turn a small irritation into a painful corneal ulcer.
Some dogs inherit facial features that predispose them to it. Others develop eyelid rolling because an already painful eye is being squeezed shut, so treatment starts by understanding both the lid and the eye beneath it.
Quick Answer
Entropion causes the eyelid edge and nearby hairs to turn towards the cornea. Persistent anatomical entropion often needs surgical correction, while temporary tacking can protect the eye in selected growing puppies. Drops may treat damage but do not permanently correct the lid's shape. A squinting or cloudy eye needs prompt veterinary assessment.
Why does entropion develop?
Lid length, facial folds, the position of the eyeball and the shape of the skull all influence whether the lid sits correctly. Some breeds are predisposed, but any dog with concerning signs deserves an examination.
Entropion can also follow scarring or changes in tissues around the eye. Pain can cause a spastic component: the dog squeezes the lids tightly, which worsens the inward turn. Treating that pain may change how much permanent correction is needed.
Signs that change the urgency
| What you see | What it may mean | Next step |
|---|---|---|
| Recurrent wet fur below the eye | Lid or tear-drainage problem | Arrange an examination |
| Squinting, rubbing or redness | Active irritation or ulceration | Seek same-day care |
| Cloudy cornea, visible defect or sudden vision change | Potentially serious corneal disease | Get urgent veterinary help |
How vets decide what needs correcting
The vet observes eyelid position and examines the cornea, often using fluorescein to detect ulcers. Assessment before and after appropriate pain relief can help distinguish anatomical rolling from pain-related squeezing. Tear production and other eye tests may also be needed.
Abnormal eyelashes, facial hair contact, dry eye and foreign bodies can cause similar signs or occur alongside entropion. A visible rolling lid is not a reason to skip examination of the rest of the eye.
Tacking, surgery and realistic expectations
Temporary tacking stitches can hold a young dog's lid away from the cornea while the face develops. They are a protective measure, not a guarantee that permanent surgery will be unnecessary. Definitive procedures reshape the tissues so the lid rests more appropriately.
The amount of correction needs to be precise. Too much can turn the lid outward, while too little may leave rubbing. Some dogs need staged procedures or revision, especially with complex facial conformation. MSD Veterinary Manual guidance on eyelid disorders explains why temporary tacking and definitive correction have different roles.
When is this an emergency?
Seek urgent assessment for an eye held tightly shut, sudden cloudiness, a visible wound or loss of vision. Do not wait for a planned surgical appointment if pain develops. Avoid leftover steroid drops and prevent rubbing while arranging care.
What to do before and after treatment
- Follow the prescribed corneal treatment while awaiting correction.
- Ask which signs mean the operation or review must happen sooner.
- After surgery, keep the protective collar on and give only prescribed medication.
- Prevent face rubbing against furniture, bedding or paws.
- Attend the wound and corneal rechecks, including stitch removal when applicable.
- Report renewed tearing or squinting after the initial recovery.
Many eyelid procedures are reviewed within the first couple of weeks, but exact timing depends on the operation and the condition of the cornea. Do not use a calendar date alone to decide the collar can come off.
Common mistakes
- Assuming a watery eye is normal for the breed.
- Waiting for a puppy to grow while hairs continue scratching the cornea.
- Expecting antibiotics to correct eyelid anatomy.
- Assuming recurrence means nothing can be done.
Prevention and breeding considerations
Daily cleaning cannot prevent inherited lid conformation. Eye screening and responsible breeding decisions can reduce avoidable problems; discuss the significance of entropion before breeding an affected dog. Early recognition protects the cornea even when the underlying anatomy cannot be prevented.
Frequently Asked Questions
Is entropion painful?
It can be, particularly when hairs contact the cornea or cause an ulcer.
Will my puppy grow out of it?
Lid position may change with growth, but an irritated eye still needs protection and reassessment.
Can surgery restore lost vision?
It can stop ongoing rubbing, but existing corneal scarring may limit how much vision improves.
Can it affect both eyes?
Yes. Both eyes should be assessed even when only one looks sore.
Entropion is often treatable, and protecting the cornea early makes a real difference. Persistent tearing or squinting deserves an explanation, not just a wipe.
Learn more about recognising eye discomfort at ASK A VET™.
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