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Reduced Tear Production in Dogs

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

When to visit the vet?

Urgent see a veterinarian within 24 hours

RED for severe eye pain, corneal opacity/injury (suspected ulcer), acute vision loss, or inability to close the eyelid.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition

Reduced tear production in dogs, also known as Keratoconjunctivitis sicca (KCS) or dry eye, is an eye disease characterized by decreased tear production. This can lead to dryness and inflammatory conditions of the cornea and conjunctiva.

Can Occur with the Following Diseases:

Basics and possible causes

Tears are crucial for eye health. They provide moisture, offer nutrients, flush away foreign bodies, and contain enzymesEnzymes are biological catalysts that accelerate specific chemical reactions in the body without being consumed. They play a crucial role in virtually all physiological processes. that fight infections. Tears consist of three layers: the lipid layer, which prevents evaporation; the aqueous layer, which provides nutrients and moisture; and the mucin layer, which distributes tears evenly over the eye surface.

Decreased tear production can be caused by several factors. A common cause is an autoimmune reaction, where the immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body. attacks the tear glands and impairs their function. Certain breeds, such as Bulldogs, Cocker Spaniels, and West Highland White Terriers, are genetically predisposed to KCS.

Other causes can include neurological problems where the nerves supplying the tear glands are damaged. Infections, particularly CanineCanine refers to anything related to dogs. The term is used to describe characteristics, diseases, or specific aspects that specifically affect dogs. Distemper VirusA virus is a microscopic infectious particle that cannot reproduce on its own and must infect a host cell to produce new virus particles. Viruses can cause a variety of diseases in humans, animals, and plants., can also affect the tear glands. Finally, certain medications, such as sulfonamides, can reduce tear production.

Environmental factors, such as dry air or smoke, can worsen symptoms by accelerating the evaporation of already scarce tears. ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. conjunctivitis can also indicate reduced tear production, as the irritated mucous membrane can negatively affect the tear glands.

Typical accompanying symptoms

Redness of the eyes: A typical sign of ocular inflammation caused by dryness and irritation of the eyes.
Discharge from the eyes: Often thick and yellowish or greenish in color, as the eyes try to protect themselves by producing mucus.
Frequent blinking or squinting of the eyes: The dog tries to moisten the eye surface and protect it from irritation.
Clouding of the cornea: Long-term dryness can lead to clouding and sometimes even ulcers on the cornea.
Increased Scratching the eyes: The dog may try to relieve the itching or discomfort by rubbing or scratching.
Decreased appetite or activity level: Due to discomfort or Pain, the dog may appear lethargic overall.

When to see a vet?

A veterinarian should be consulted if one or more of the above symptoms occur, especially if they do not resolve on their own within a few days. Early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. can prevent permanent eye damage.

In particular, an immediate visit to the veterinarian is necessary if there are signs of corneal clouding or ulcers, as these conditions can lead to permanent vision loss or Blindness if left untreated.

Also, if the dog frequently rubs its eyes or appears to be in Pain, a visit to the veterinarian is strongly recommended to clarify the cause of the discomfort and initiate appropriate treatment.

Symptom recognition for the pet owner and veterinary diagnostic procedure

For the pet owner, observing the symptoms is the first step towards diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients.. Daily inspection of the eyes for redness, discharge, or other changes can help detect problems early.

The veterinarian will usually perform a Schirmer tear test to measure tear production. This involves placing a special paper strip at the edge of the eye and measuring the amount of absorbed tears after a certain period.

In addition to measuring tear production, the veterinarian will examine the eyes with a slit lampA slit lamp is a special microscope used in veterinary ophthalmology to examine the anterior structures of the eye in detail, including the cornea, the iris, and the lens. Examination with a slit lamp can aid in the diagnosis of eye diseases in dogs and cats. to check the cornea and conjunctiva for damage or ulcers. Fluorescein stainingFluorescein staining is a diagnostic technique that uses fluorescein, a fluorescent dye, to make tissues, cells, or microbiological samples visible under a microscope, especially in ophthalmology to detect damage to the cornea. can be used to visualize corneal damage.

The veterinarian may also perform a complete physical examination and, if necessary, blood tests to identify underlying causes such as autoimmune diseasesAutoimmune diseases are conditions in which the immune system mistakenly attacks the body's own cells or tissues as if they were foreign substances. Examples in dogs and cats include autoimmune hemolytic anemia and systemic lupus erythematosus. or infections.

What the pet owner can do and professional therapy options

As a first measure, the pet owner can try rinsing the dog’s eyes with a sterile saline solution to clear them of irritants and mucus. This can provide temporary relief.

It is important to prevent the dog from scratching or rubbing its eyes, as this can worsen symptoms and lead to injuries. An Elizabethan collar may be necessary in severe cases.

The pet owner should ensure that the dog does not remain in smoky or particularly dry environments, as these can worsen symptoms. A humidifier can help increase humidity in the home environment.

Long-term, it is crucial to administer the medication prescribed by the veterinarian regularly. These may include tear substitutes or medications to stimulate tear production, as well as anti-inflammatory eye drops or ointments.

Outlook on current research

Reduced tear production in dogs is a symptom that is increasingly receiving attention in veterinary medicine. This symptomatologySymptomatology refers to the entirety of symptoms associated with a particular disease or condition. It describes how a disease manifests itself externally. can indicate various underlying problems, with research focusing on both diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and treatment options. Traditionally, reduced tear production was often not recognized as a standalone problem but was considered in conjunction with other eye diseases. However, recent studies have shown that tear production itself plays a crucial role in the health of the ocular surface and that a deficit in this area can cause serious complications.

A significant research approach is the investigation of tear gland function and the factors that influence its activity. Scientists are currently investigating the role of inflammatory processes and autoimmune reactions that can disrupt tear gland function. By understanding the molecular mechanisms that regulate tear production, researchers hope to develop new therapeutic approaches that can specifically target these processes.

Another area of research concerns the genetic factors that can influence tear production. Certain dog breeds appear to be more susceptible to reduced tear production, indicating that genetic predispositions may play a role. Studies on genetically related dogs aim to identify specific gene variants responsible for this susceptibility. Such discoveries could pave the way for genetic tests that enable early identification of at-risk animals.

In clinical research, new diagnostic methods are being developed to detect reduced tear production early and accurately. These methods include both quantitative tests that measure the amount of tears produced and qualitative tests that analyze the composition of the tears. Combining these tests could help veterinarians better understand the underlying causes and develop more targeted treatment strategies.

Another area of research focuses on developing new therapeutic approaches to increase tear production. This includes testing medications that stimulate the tear glands, as well as researching regenerative therapies, such as stem cell therapies, which could restore tear gland function. InitialInitial means beginning or at the start. In medicine, it can refer to the first symptoms of a disease or the first phase of a treatment process. clinical studies with such approaches have shown promising results, but further research is needed to fully evaluate their efficacy and safety.

In summary, research into reduced tear production in dogs is a dynamic and multidisciplinary field, ranging from molecular biological studies to clinical applications. Advances in this area have the potential to significantly improve the quality of life for dogs with tear production deficits and optimize treatment outcomes for these animals.

Frequently asked questions

1. What does it mean if tear production is reduced in dogs?

Reduced tear production in dogs means that the eyes are not adequately supplied with tears. This can lead to dryness of the eye surface, irritation, and inflammatory conditions.

2. How do I know if my dog may have reduced tear production?

Symptoms can include redness of the eyes, frequent blinking, increased eye rubbing, and a dull eye sheen. A veterinarian can confirm the diagnosis through specific tests.

3. What tests are used to measure tear production in dogs?

The Schirmer tear test is the most commonly used test to measure tear production. It involves placing a special strip under the eyelid to collect and measure the amount of tears produced.

4. Can all dog breeds be affected by reduced tear production?

Yes, all dog breeds can generally be affected, but certain breeds show a higher susceptibility. These primarily include brachycephalic breeds and certain terriers.

5. Are there treatment options for dogs with reduced tear production?

Yes, there are various treatment options, including the use of artificial tears, medications to stimulate the tear glands, and in some cases, surgical interventions. The treatment should be individually adjusted by the veterinarian.

6. Can reduced tear production be cured in dogs?

In many cases, reduced tear production cannot be completely cured, but it can be effectively managed through appropriate treatment strategies to improve the dog's quality of life.

7. What long-term complications can occur if reduced tear production is not treated?

Untreated, reduced tear production can lead to chronic eye inflammatory conditions, corneal ulcers, and in the worst case, vision loss. Early intervention is crucial to avoid such complications.

8. Are special care or hygiene measures required for dogs with reduced tear production?

Yes, regular eye cleaning and the application of moisturizing eye drops can help relieve symptoms and prevent infections. Regular veterinary check-ups are also important.

9. Can diet affect tear production in dogs?

A balanced diet can contribute to overall health, but there are no specific dietary measures that directly increase tear production. However, supplements containing omega-3 fatty acids can have anti-inflammatory effects and promote eye health.

10. How can I help my dog with reduced tear production in everyday life?

Make sure your dog lives in an environment with little dust and irritants, use moisturizing eye drops regularly, and seek regular advice from a veterinarian to monitor and adjust the condition.