A Shih Tzu with eyes closed facing the camera

Eye discomfort in dogs is one of the most easily overlooked issues, partly because the outward appearance often isn't as alarming as you'd expect. Maybe the eye is just a bit red, there's extra blinking, or discharge has slightly increased — but for the eye, any of these can indicate pain, inflammation, foreign body friction, or corneal injury. And because eye conditions can progress rapidly, many situations simply aren't safe to wait out.

Squinting Itself Is an Important Signal

If a dog is clearly keeping one eye partially closed, blinking repeatedly, avoiding light, or pawing at the eye, that typically warrants more concern than a bit of eye discharge. Dogs don't squint because their "eye is tired" — they squint to reduce discomfort. This is especially worth noting when it only affects one side, which points to a localized problem.

Redness, Tearing, and Increased Discharge Don't Always Mean a Simple Infection

Owners most commonly assume redness means conjunctivitis, but corneal scratches, ingrown eyelashes, foreign objects, dry eye, and pressure issues can all look somewhat similar. That's why the most useful approach isn't guessing the diagnosis at home — it's knowing this: if the dog looks like they're in pain, squinting, or rubbing constantly, don't just apply random drops.

Which Breeds Are More Prone to Eye Problems?

Skull structure has a significant impact on eye health. Brachycephalic breeds (Pugs, French Bulldogs, Pekingese, Shih Tzus) have shallower eye sockets and more prominent eyeballs, which means more corneal surface is exposed to dryness, foreign bodies, and friction — and the incidence of corneal ulcers is notably higher. Some brachycephalic dogs can't fully close their eyelids, leaving their eyes partially open during sleep, which leads to chronic corneal dryness and damage over time.

Another common category involves eyelid issues. Breeds like Shar-Peis, Cocker Spaniels, and Saint Bernards may have a tendency toward entropion — where the eyelid margin and lashes roll inward, continuously rubbing against the cornea. Left untreated, this causes chronic corneal damage and pain. If your dog belongs to one of these breeds, regular eye exams are even more important — don't wait until obvious discomfort appears.

White or light-colored dogs often show noticeable tear staining below the eyes. This doesn't necessarily indicate a problem; some cases result from impaired tear drainage (narrow or blocked nasolacrimal ducts), where tears overflow from the eye corner and oxidize, causing discoloration. However, if tear staining suddenly worsens, deepens in color, or is accompanied by redness and swelling, it shouldn't be dismissed as merely a cosmetic issue.

What You Should Definitely Not Do: Use Human Eye Drops or Old Prescriptions

Eyes are different from skin — some medications can actually worsen certain conditions. Especially if the corneal surface is injured, inappropriate drops may mask symptoms or even delay treatment. Even if you have leftover medication from a previous issue, it may not apply this time.

Situations That Especially Can't Wait

If the dog already shows obvious squinting, persistent pawing at the eye, very red sclera, cloudy cornea, sudden light sensitivity, abnormal-looking eyeball, or discharge that's turned yellow or green, these generally aren't safe for at-home observation alone. Flat-faced breeds and dogs with prominent eyes should be treated even more conservatively.

What You Can Do at Home Is Protection — Not Resolution

If you suspect a foreign body in the eye or a scratch, the priority is preventing further rubbing and not applying unknown drops. This is usually more important than repeated cleaning, because the real risk often isn't the redness itself, but the continued friction and pain deepening the injury.

What Daily Eye Care Can Look Like

While most eye problems require veterinary attention, daily maintenance can lower the risk. The basics include regularly cleaning discharge around the eyes, especially for breeds with large eyes, long facial fur, or heavy tear staining. Use clean gauze or cotton pads dampened with saline solution and gently wipe the eye corners — no need to dig.

Another often-overlooked step is trimming the fur around the eyes. Some long-haired breeds have fur constantly poking into the eyes, which over time is like someone repeatedly jabbing at your eyeball. If you're unsure how to trim safely, a groomer can help.

Letting your dog stick their head out the car window while driving makes for a cute photo but poses real eye risks. High-speed wind carries dust and grit directly onto the cornea and causes dryness. If you frequently drive with your dog, crack the window for ventilation but don't let their entire face be exposed to the wind.

Eye Issues Are Tricky Because They Can Worsen Faster Than You'd Expect

Many people underestimate eye discomfort because the dog is still eating and walking. But as long as there's obvious squinting or signs of pain, it's worth taking seriously. Unlike many chronic conditions that can be monitored gradually, eyes tend to require earlier intervention.

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