Shih Tzus are one of the breeds most prone to eye problems, largely because their large, prominent eyes and short, flat-faced skull shape leave the eye surface exposed and vulnerable to injury, dryness and infection. The single most important thing to know is that eye problems in this breed can worsen from minor irritation to a sight-threatening emergency within hours, so any sudden squinting, redness, or cloudiness needs same-day veterinary attention rather than a "wait and see" approach.
Why Shih Tzus Are Prone to Eye Problems
The Shih Tzu's charming face is also its biggest vulnerability. This is a brachycephalic breed, meaning it has a flattened skull and shortened muzzle. As a result, the eye sockets are shallow and the eyeballs sit more prominently forward than in longer-nosed breeds. This anatomy brings several knock-on effects:
- Shallow orbits mean the eyes protrude further, increasing the risk of trauma from twigs, grass seeds, other pets' claws, or simply bumping into furniture.
- Prominent eyes and reduced blink coverage can leave parts of the cornea exposed, contributing to dryness and irritation, particularly during sleep.
- Facial skin folds around the nose and eyes can cause hairs to rub against the eye surface, leading to chronic irritation.
- Long facial hair, if not kept trimmed, can poke into the eyes or trap debris and tear staining against the skin.
- Eyelid conformation abnormalities, such as entropion (where the eyelid rolls inward) or distichiasis (extra eyelashes growing in abnormal positions), are seen more often in this breed and cause ongoing corneal rubbing.
On top of the anatomical predisposition, Shih Tzus are also recognised as being at increased risk of certain inherited or breed-associated conditions, including corneal ulcers, dry eye (keratoconjunctivitis sicca), progressive retinal atrophy, and cataracts. Understanding this bigger picture is covered in more depth in the Shih Tzu breed guide, which explains how the breed's overall structure influences its health.
Early Signs and Symptoms to Watch For
Because problems can escalate quickly in this breed, owners benefit hugely from knowing the early warning signs. Watch for:
- Squinting or holding one eye partially closed
- Excessive blinking or pawing at the face
- Redness of the white part of the eye or the surrounding skin
- Cloudiness, a blue-grey haze, or a visible white/grey spot on the eye surface
- Increased tear production, thick discharge, or unusual tear staining
- Sensitivity to light
- Rubbing the face along the floor or against furniture
- A visibly bulging eye or one that appears to sit differently from the other
Mild tear staining alone is common in the breed and often relates to tear duct drainage rather than disease, but any combination of the above signs, especially redness plus squinting, should prompt a vet visit rather than home treatment.
When It's an Emergency
Some presentations need urgent same-day care, not a routine appointment. Treat the following as emergencies:
- A visibly bulging or displaced eyeball (proptosis) — this can happen after even relatively minor trauma or restraint around the neck/face in this breed, and rapid veterinary intervention is critical to any chance of saving the eye
- Sudden severe swelling, redness or pain
- A cloudy, ulcerated or ruptured-looking eye surface
- Sudden apparent blindness or bumping into objects
- An eye that has visibly changed shape or size overnight
- Persistent discharge with the eye held shut and the dog clearly distressed
Corneal ulcers in particular can progress from superficial to deep and perforating within 24–48 hours in brachycephalic breeds, so delaying care even by a day can turn a manageable problem into one requiring surgery or risking loss of the eye.
Diagnosis
A vet will typically start with a thorough physical examination of the eyelids, tear ducts, and eye surface, often using a fine ophthalmic light. Common diagnostic tools include:
- Fluorescein staining — a dye applied to the eye that highlights ulcers or corneal damage
- Schirmer tear test — measures tear production to check for dry eye
- Tonometry — measures internal eye pressure to screen for glaucoma
- Slit-lamp or magnified examination — assesses the cornea, lens and internal structures in detail
- Referral to a veterinary ophthalmologist — for complex cases such as suspected progressive retinal atrophy or advanced cataracts, where specialist equipment and expertise improve accuracy
Management and Treatment Options
Treatment depends heavily on the underlying cause:
- Corneal ulcers are usually managed with antibiotic eye drops or ointment, pain relief, and sometimes a protective Elizabethan collar to prevent self-trauma; deeper or non-healing ulcers may need surgical intervention such as a grid keratotomy or conjunctival graft.
- Dry eye (KCS) is typically managed long-term with lubricating drops and immune-modulating medications like ciclosporin or tacrolimus, which help stimulate natural tear production.
- Entropion is corrected surgically to stop the eyelid rolling inward and rubbing the cornea.
- Distichiasis or ectopic cilia (misplaced eyelashes) may be managed with epilation or, if recurrent, minor surgery or cryotherapy.
- Cataracts, when significantly affecting vision, may be surgically removed via phacoemulsification, performed by a veterinary ophthalmologist.
- Progressive retinal atrophy currently has no cure; management focuses on supporting the dog as vision declines, since the condition is not painful.
- Glaucoma requires urgent pressure-lowering medication and sometimes surgery to preserve vision and comfort.
Your vet will tailor a plan based on the specific diagnosis, and many conditions require ongoing monitoring even after initial treatment succeeds.
Prevention and Daily Care
While genetics and anatomy can't be changed, daily care makes a real difference in reducing risk and catching problems early:
- Keep facial hair trimmed away from the eyes to prevent rubbing and irritation
- Clean around the eyes daily with a soft, damp cloth to remove discharge and reduce staining
- Check both eyes each day for redness, cloudiness or asymmetry as part of a grooming routine
- Avoid rough play or situations where sticks, long grass or other pets' paws could reach the face
- Use a harness rather than a collar to avoid pressure around the neck and head area
- Book regular veterinary check-ups, and mention any breed-specific eye screening options, particularly if considering breeding
- Respond promptly to even mild squinting or redness rather than waiting for it to resolve on its own
Cost and Prognosis Realism
Costs vary widely depending on the condition and whether specialist referral is needed. A straightforward superficial ulcer treated early with drops is relatively inexpensive, whereas surgical correction of entropion, ulcer repair surgery, cataract removal, or ongoing glaucoma management can involve significant and sometimes recurring costs, especially if specialist ophthalmology referral is required. Pet insurance that covers eye conditions from a young age is worth considering given the breed's predisposition.
Prognosis is generally good for conditions caught early, such as superficial ulcers or entropion corrected before chronic damage occurs. Conditions like progressive retinal atrophy carry a poorer visual prognosis but are not painful, and many dogs adapt remarkably well to vision loss with a stable home environment. The overarching theme is that early detection consistently leads to better outcomes and lower costs than delayed treatment.
Frequently Asked Questions
Is tear staining in my Shih Tzu something to worry about?
Mild tear staining alone, without redness, squinting or discharge, is common in the breed and often relates to facial structure and tear drainage rather than a serious problem. However, if staining increases suddenly or is accompanied by other symptoms, it's worth a vet check to rule out blocked tear ducts, infection or irritation.
Can I use human eye drops on my Shih Tzu?
No, you should avoid using any human eye product without veterinary guidance. Some human formulations contain ingredients unsuitable for dogs, and using the wrong treatment can mask symptoms or worsen certain conditions like ulcers. Always get a proper diagnosis before applying anything to the eye.
Should I be worried about breeding a Shih Tzu with eye problems?
Yes, several eye conditions seen in this breed have a genetic component, and dogs with a history of significant eye disease, particularly progressive retinal atrophy or severe eyelid abnormalities, are generally not recommended for breeding. Discuss any breeding plans with your vet and consider genetic or ophthalmic screening where available.
This article is for general informational purposes only and does not replace professional veterinary advice. Always consult a qualified vet for the diagnosis and treatment of your pet's eye condition.