A hit to a dog’s eye can cause anything from a minor surface scratch to serious internal damage that threatens vision permanently. The outcome depends on the force of the impact, what struck the eye, and how quickly the dog receives veterinary care. Even a blow that looks minor on the outside can cause inflammation or bleeding inside the eye that isn’t visible without specialized equipment.
Immediate Signs You’ll Notice
The first thing most dogs do after an eye injury is squint. They’ll hold the affected eye partially or fully closed, and you may see a flood of tears streaming down that side of the face. Some dogs paw at the eye or rub their face along the ground, which can make things worse. The eye itself may look red, swollen, or cloudy. In more serious cases, you might notice blood visible inside the eye, where you’d normally see the colored iris and dark pupil.
Dogs in pain from an eye injury often become head-shy, pulling away when you try to look at the affected side. They may lose appetite or seem unusually quiet. Because the cornea (the clear outer surface of the eye) is packed with nerve endings, even a small scratch there causes intense discomfort, heavy blinking, and tearing.
The Range of Possible Injuries
A blunt hit to the eye can damage structures at every level, from the surface inward. Here are the most common injuries, roughly ordered from least to most severe.
Corneal ulcer. This is a scratch or wound on the outer surface of the eye. It’s the most common injury from trauma. The protective outer layer of cells gets scraped away, exposing the sensitive tissue underneath. A shallow ulcer typically heals within one to two weeks with antibiotic eye drops to prevent infection. A deeper ulcer, one that penetrates further into the cornea, takes closer to 19 to 30 days and sometimes requires a protective flap stitched over the wound. Older dogs tend to heal more slowly.
Anterior uveitis. This is inflammation inside the eye, and it’s one of the most common causes of blindness in dogs. A blow to the eye sends a shockwave through the internal structures, triggering swelling and pain even when the outside of the eye looks relatively normal. Without treatment, this inflammation can become chronic and lead to cataracts or retinal damage over weeks to months.
Hyphema. When blood vessels inside the eye rupture from the impact, blood pools in the front chamber of the eye. You’ll see a red or dark mass obscuring part or all of the iris. If the entire chamber fills with blood, the eye takes on a dark, opaque “eight-ball” appearance. Hyphema is serious because the blood itself can cause secondary problems: increased eye pressure (glaucoma), cataracts, and permanent corneal staining.
Retinal detachment. The retina is the light-sensing tissue at the back of the eye. A hard enough blow can cause it to peel away from its supporting layer, partially or completely. A partial detachment may not obviously affect your dog’s behavior, especially if the other eye is fine, so it often goes undetected for weeks or months until complications like internal bleeding or inflammation develop. A complete detachment in one eye means that eye is blind.
Globe rupture. In the worst cases, the eyeball itself splits open from the force. This is an emergency. The eye fills with blood instantly, and vision is usually lost permanently.
Flat-Faced Breeds Face Extra Risk
Dogs with short snouts and prominent eyes, such as Pugs, Shih Tzus, Boston Terriers, and French Bulldogs, are especially vulnerable to a specific injury called proptosis: the eyeball pops forward out of the socket and gets trapped in front of the eyelids. Their shallow eye sockets and naturally bulging eyes make this far more likely than in longer-snouted breeds.
Proptosis looks alarming, but the prognosis for saving vision is fair to good if the displacement is mild, if a vet can replace the eye within two to three hours, and if the eye still shows signs of nerve function. Do not try to push the eye back in yourself. This requires anesthesia to avoid damaging the interior of the eye. While waiting for emergency care, keep the exposed eyeball moist with contact lens solution, water, or a damp cloth.
What to Do Right After It Happens
Do not try to treat the eye yourself, and do not attempt to remove any object that may be stuck in it. Your priority is preventing further damage and getting to a vet.
- If a chemical splashed in the eye: Flush with running water or saline for at least 15 minutes. You can make saline at home by dissolving two teaspoons of table salt in one quart of water.
- If the eye has popped out of the socket: Keep it moist with contact lens solution, water, or a wet compress. Do not push it back in.
- If the eye is swollen shut or bleeding: Prevent your dog from pawing at it. An Elizabethan collar (cone) works best. A soft cloth held gently over the eye can help on the way to the vet.
Any eye injury warrants same-day veterinary attention. Internal bleeding and inflammation can worsen rapidly in the hours after impact, and the window for the best outcomes is short.
What the Vet Will Check
A veterinary eye exam after trauma typically involves a few specific tests. To check for corneal ulcers, the vet applies a fluorescent orange dye to the eye’s surface. Healthy cornea repels the dye, but any area where the outer layer is missing will glow bright green under a blue light. If the wound is deep, the vet may also use the dye to check whether fluid is leaking from inside the eye, which signals a perforation.
The vet will measure the pressure inside the eye. Normal pressure in a healthy dog falls between 10 and 21 mmHg. Pressure that’s too high suggests developing glaucoma from internal swelling or blood. Pressure that’s too low suggests the eye may have a leak or that severe inflammation is shutting down fluid production. Both readings change the treatment plan significantly.
For suspected internal injuries like retinal detachment or deep bleeding, the vet may use ultrasound to see the structures at the back of the eye, especially when blood inside the eye blocks a direct view.
Long-Term Complications
Even after the initial injury heals, the eye can develop problems weeks or months later. Chronic inflammation inside the eye is the main driver of these complications. Inflammatory chemicals gradually damage the lens, leading to cataract formation. The retina can also deteriorate over time, leaving areas of permanent degeneration even after inflammation resolves.
Hyphema carries its own set of long-term risks. Blood trapped inside the eye can clog the drainage system, causing pressure to build (secondary glaucoma). Dogs with chronic hyphema or secondary glaucoma have a poor prognosis for keeping vision in that eye. In some cases, if glaucoma becomes painful and unmanageable, surgical removal of the eye is considered as a final option to relieve suffering.
Can Vision Be Restored After Serious Damage?
For mild to moderate injuries like superficial corneal ulcers and controlled inflammation, most dogs recover full vision with proper treatment. The outlook gets significantly worse with retinal detachment, severe hyphema, or globe rupture.
Retinal detachment was long considered untreatable in dogs, but surgical reattachment is now possible in some cases. In one study of dogs with chronic detachments, three out of six regained functional vision after surgery, meaning they could navigate a room, find toys, and go up and down stairs. Some maintained that vision for one to three years after the procedure. Still, these surgeries are specialized, expensive, and not available everywhere.
Dogs adapt remarkably well to vision loss in one eye. They may bump into things on their blind side initially, but most adjust their spatial awareness within a few weeks and return to a normal quality of life. The priority after any serious eye trauma is managing pain and preventing complications in the healthy eye.