TL;DR: Entropion occurs when a dog's eyelid rolls inward, causing painful irritation that requires veterinary care within 24 to 48 hours to prevent permanent eye damage.
What is entropion and how does it affect my dog's eyes?
When a dog's eyelid rolls inward so that the hair and lashes rub against the eye, the condition is medically known as entropion. This structural abnormality can cause chronic irritation, as the sensitive surface of the eye—the cornea—is constantly being abraded by the fur. It is commonly seen in specific breeds with loose skin or certain facial structures, but it can also occur due to scarring or persistent squinting from other eye issues.
Is my dog's inward-rolling eyelid considered a medical emergency?
- The urgency level for an inward-rolling eyelid is Medium.
- While not usually life-threatening, it is extremely painful and can lead to serious complications like corneal ulcers, pigmentation, or eye perforation.
- If left untreated, these complications may lead to permanent vision loss.
- You should aim to have your pet seen by a veterinarian within 24 to 48 hours.
How does sending a photo of my dog's eye help the veterinary team with triage?
- A photo allows the professional to see the degree of the roll and the presence of any discharge.
- It helps the team determine if the surface of the eye appears cloudy or damaged.
- This visual information helps the clinic prioritize your appointment correctly.
- It provides a baseline to compare against during the physical examination.
Clinical Context (Merck Veterinary Manual)
Entropion, the rolling inward of the eyelid, is a common inherited eyelid defect in many canine breeds, but can also be caused by cicatrix formation and severe blepharospasm secondary to ocular or periocular pain. Inversion of the cilia or facial hairs causes conjunctival and corneal irritation, potentially leading to corneal scarring, pigmentation, and ulceration if left untreated. Early spastic entropion may be reversed by removing the inciting cause or alleviating pain by everting the lid hairs away from the eye using mattress sutures, subcutaneous injections (e.g., procaine penicillin), or palpebral nerve blocks. Temporary stay sutures or surgical staples may be used in very young puppies, but established entropion usually requires surgical correction.
Chapter: Ophthalmology, Surgery
Source: The Merck Veterinary Manual, 11th Edition (Page 489)