Pugs’ eyes can pop out of their sockets because their skull shape creates abnormally shallow eye sockets. The eyeballs themselves are normal-sized, but the bone cavity holding them in place is too flat and too open, leaving the eyes vulnerable to displacement from relatively minor force. This condition, called proptosis, is a genuine veterinary emergency that flat-faced breeds experience far more often than other dogs.
The Skull Shape Behind the Problem
Pugs belong to a group of breeds called brachycephalic dogs, meaning they were selectively bred for short, flat faces. That compressed skull changes more than the shape of their nose. It reshapes the entire bone structure around the eyes. In most dog breeds, the eye sits deep within a bony socket that holds it securely in place. In pugs, that socket is dramatically shallower, so the eyeball sits closer to the surface and bulges outward.
This is why pugs always look like they have oversized eyes. Their eyes aren’t actually bigger than those of similarly sized dogs. The illusion comes from the orbit being too shallow to contain them fully. That exposed position makes the eyes more prone to infections, corneal ulcers, difficulty blinking completely, and, in the worst cases, the eye slipping out of the socket entirely.
What Triggers It
Because the eye is already sitting in a shallow socket with limited bony support, it doesn’t take catastrophic force to displace it. Common triggers include blunt trauma to the head or face (a collision with furniture, a fall, or a fight with another dog), excessive pressure on the neck from pulling against a collar, and rough handling during grooming or restraint. Even vigorous play or being scruffed can create enough pressure in some cases.
Any situation that increases pressure behind or around the eye can be enough. The eyelids, which in other breeds act as a secondary barrier, are often too wide in pugs to catch and hold the eye if it starts to shift forward. Once the eye moves past the eyelid margin, the lids can actually trap behind the eyeball and prevent it from sliding back into place on its own.
How Common This Is in Pugs
Pugs are one of the most frequently affected breeds. A study published in the Journal of the American Veterinary Medical Association reviewed nearly 1,000 eye-related cases across seven brachycephalic breeds seen at referral hospitals over a decade. Pugs accounted for about 21% of all cases, making them the second most common breed after Shih Tzus. Boston Terriers, English Bulldogs, Lhasa Apsos, Pekingese, and French Bulldogs round out the high-risk list, but pugs consistently rank near the top for ocular emergencies.
What Happens to Vision
The prognosis after an eye pops out depends heavily on how much damage occurs during the event and how quickly the dog receives veterinary care. Research on small-breed dogs that underwent globe replacement surgery paints a sobering picture. In a study of 15 cases, only about a third had a favorable outcome with retained vision. Dogs that had fewer torn eye muscles at the time of injury had the best chances. When three or more of the small muscles that control eye movement were torn, the eye often shrank and lost function permanently.
Even when the eye is successfully repositioned, complications are common. Some dogs develop a permanent outward turn of the affected eye or other alignment issues. Others lose the eye entirely if it deteriorates after surgery. Speed matters enormously. The longer the eye remains displaced, the more the optic nerve stretches, blood supply is cut off, and the cornea dries out, all of which reduce the chances of saving vision.
What to Do If It Happens
Proptosis is a surgical emergency, and the single most important thing you can do is get your dog to a veterinarian immediately. In the time between the injury and reaching the clinic, keep the exposed eye moist. Artificial tears or sterile saline solution applied continuously will help protect the cornea from drying out and sustaining further damage. Do not attempt to push the eye back in yourself.
If you have an Elizabethan collar (the cone-shaped recovery collar), put it on your dog right away. Dogs will instinctively paw at the displaced eye, which can cause additional tearing of the muscles and tissues holding the eye in place. Preventing self-trauma during the trip to the vet can make the difference between saving and losing the eye.
How Veterinarians Treat It
The standard emergency treatment involves carefully repositioning the eyeball back into the socket under anesthesia, then temporarily stitching the eyelids partially closed to hold it in place while tissues heal. The stitches typically stay in for two to three weeks. During recovery, dogs wear an Elizabethan collar full-time and receive medications to manage pain, reduce swelling, and prevent infection.
For pugs that experience repeated issues or are at high risk, there’s a preventive surgical option. A procedure that shortens the eyelid opening can reduce the chance of future displacement. This surgery corrects several problems at once: it narrows the overly wide eyelid gap, fixes inward-rolling eyelid edges that irritate the eye, and helps the dog blink more effectively. By reducing how exposed the eye is, it lowers the risk of both everyday corneal damage and full proptosis. A UK referral hospital review found that owners reported improved quality of life for their dogs after this procedure.
Preventing Eye Injuries in Pugs
The most practical change pug owners can make is switching from a collar to a harness. Research comparing the two found that simply wearing a collar while standing still increased eye pressure in brachycephalic dogs, even without any pulling or tension. In long-snouted breeds, the same collar had no effect. When dogs exercised while wearing a collar, eye pressure went up in all breeds, but exercising in a harness did not increase eye pressure in either group. For a pug whose eyes are already sitting in shallow sockets, that added pressure from a collar is a real and avoidable risk factor.
Beyond the harness switch, managing your pug’s environment helps. Supervise interactions with larger dogs, since facial bites and rough play are common triggers. Be gentle during grooming, especially around the head and neck. Avoid picking your pug up by the scruff or applying pressure near the face. Keep furniture and play areas free of sharp edges at pug-face height. And if your pug has particularly prominent eyes or a history of corneal issues, talk to a veterinary ophthalmologist about whether a preventive eyelid procedure makes sense.