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Raised Spots on the Cornea of the Eye in cats

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

When to visit the vet?

Urgent see a veterinarian within 24 hours

RED FLAG for severe pain (squinting), cloudiness, purulent discharge, or worsening vision.

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Definition

Raised spots on the cornea of the eye can be a sign of various eye diseases in cats. These raised spots are often the result of deposits or changes in the corneal structure, which can be caused by injuries, infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., or systemic diseases.

Can Occur with the Following Diseases:

Basics and possible causes

The cornea is the clear, dome-shaped front surface of the eye and plays a crucial role in focusing light. Any irregularity or damage to the cornea can impair vision. Raised spots can be caused by a range of factors, including injuries, infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., or genetic conditions.

A common cause of raised spots is a corneal ulcerationAn ulceration is an open wound or sore, typically on the skin or mucous membranes, characterized by the loss of surface tissue. Ulcerations in dogs and cats can be caused by infections, chronic inflammatory conditions, or cancer., which may be caused by an injury or infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.. Over time, these ulcerations can be accompanied by deposits of proteins or calciumCalcium is a mineral that is essential for building and maintaining strong bones and teeth. It also plays a role in blood coagulation, nerve transmission, and muscle contraction. that form the raised spots.

Another cause could be corneal dystrophyDystrophy refers to a group of conditions characterized by progressive weakening and loss of muscle mass. These conditions are often genetic and can affect various muscles in the body., a genetic condition that causes crystals or fat to be deposited in the cornea. This condition is often bilateral and can impair vision if left untreated.

Infections, such as herpesviruses or bacterial infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., can also cause changes in the cornea that lead to raised spots. Inflammatory conditions of the cornea, known as keratitis, can also play a role and require targeted treatment.

Typical accompanying symptoms

Cats can suffer from eye discharge, which may be clear, yellowish, or greenish. This discharge is often a sign that the eye is trying to clear itself of foreign bodies or infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..
Redness or Swelling of the eye indicates an inflammatory condition, which is often associated with pain or discomfort.
Increased blinking or squinting may indicate that the cat has pain or that the cornea is irritated.
A decreased visual acuity or disorientation may occur if the spots impair the cat’s vision.
Changes in behavior, such as decreased appetite or withdrawal, may be an indicationIndication refers to a valid reason or rationale for using a specific treatment, medication, or medical procedure. It is based on the diagnosis and the patient's clinical condition. that the cat is experiencing pain.

When to see a vet?

It is important to see a veterinarian at the first signs of raised spots on the cornea, especially if they are accompanied by pain, vision problems, or other systemic symptoms. An 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 help prevent more serious eye damage.

If the cat shows signs of pain, such as persistentPersistent means lasting or continuing for an extended period. In veterinary medicine, it can refer to chronic diseases or symptoms that do not subside. blinking or squinting, an immediate visit to the veterinarian is necessary. Sudden loss of vision or severe redness and swelling should also be examined promptly.

InfectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. or injuries to the cornea can progress quickly, so timely intervention is crucial to prevent permanent damage.

Symptom recognition for the pet owner and veterinary diagnostic procedure

Pet owners can often recognize raised spots on the cornea by closely observing their cat’s behavior and the external appearance of its eyes. If the cat frequently paws at the eye or blinks, this could indicate a problem.

A veterinarian will perform a thorough eye exam to determine the cause of the spots. This may include using an ophthalmoscope or 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 examine the corneal structure in detail.

In addition, a fluorescein test may be performed, using a special dye to make corneal injuries or ulcerations visible. In some cases, a culture may also be taken to identify possible infectiousInfectious describes the ability of a pathogen to be transmitted from one individual to another and trigger an infection. It also refers to diseases caused by such pathogens. agents.

What the pet owner can do and professional therapy options

Until the veterinary visit, pet owners should avoid treating the cat’s eyes themselves, as improper handling could make the problem worse. It is important to prevent the cat from scratching or rubbing the eye to avoid further injury.

A protective collar can be helpful to prevent the cat from reaching the eye with its paw. In addition, the cat’s environment should be kept clean to minimize the risk of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..

It is advisable to keep the cat in a quiet, stress-free room until it has been examined by the veterinarian. StressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can worsen symptoms and delay healing.

Outlook on current research

Research into raised spots on the cornea of cats’ eyes is currently focused on detailed analysis of the underlying biological processes and the development of precise diagnostic methods. Scientists are investigating the molecular mechanisms that cause these spots, with particular attention to the role of inflammatory reactions and the involvement of different cell types. It is believed that immune cellsImmune cells are specialized cells of the immune system that help to identify and fight pathogens and foreign substances. These include leukocytes such as lymphocytes (T cells and B cells), macrophages, and dendritic cells. and connective tissue cells in the cornea play a key role in the development of these raised spots. Advances in imaging technology, such as high-resolution optical coherence tomography, allow researchers to create detailed images of the corneal structure and better understand the pathophysiologyPathophysiology deals with the changes in physiological processes caused by diseases or injuries. It examines how these changes lead to the symptoms and signs of a disease. of these abnormalities.

Another focus of research is the development of new therapeutic approaches for treating and preventing raised corneal spots. Current studies are examining the effectiveness of topicalTopical refers to the direct application of medications or treatments to the skin or mucous membranes for a local effect, without being absorbed into the body. medications aimed at reducing the inflammatory response and supporting corneal healing. In addition, the potential use of gene therapies and regenerative medicine approaches, such as the use of stem cells, is being explored to achieve full restoration of corneal transparency. In the long term, these innovative approaches could offer new options for treating cats with this symptomatologySymptomatology refers to the entirety of symptoms associated with a particular disease or condition. It describes how a disease manifests itself externally..

Genetic research also plays an important role, as scientists try to identify genetic markers that predispose cats to developing raised corneal spots. By studying the genetic makeup of affected cats and comparing it with healthy animals, researchers hope to discover genetic variations associated with an increased susceptibility to this type of eye disease. These findings could form the basis for genetic screening programs that make it possible to identify at-risk cats early and take preventive measures.

Frequently asked questions

1. What are raised spots on the cornea in cats?

Raised spots on the cornea of the eye are irregular, often whitish areas that protrude above the normal surface of the cornea. They can occur as a result of injuries, infection, or other eye diseases.

2. How do you notice raised spots on the cornea in cats?

Owners often notice that their cat blinks more frequently, squints the affected eye, or shows signs of eye pain. On closer inspection, the spots can be seen as small elevations on the cornea.

3. Are raised spots on the cornea painful in cats?

Yes, these spots can be painful because they disrupt the sensitive structure of the cornea. Cats often show signs of discomfort, such as increased blinking or rubbing the eye.

4. Can raised spots on the cornea impair vision in cats?

Yes, depending on the size and location of the spots, they can affect the cat’s vision, especially if they are centrally located on the cornea. This can lead to blurred vision or even partially blocked vision.

5. How are raised spots on the cornea diagnosed?

A veterinarian can diagnose raised corneal spots through a thorough eye exam, which often includes the use of a special dye and a slit lamp to better visualize the corneal structure.

6. What treatment options are available for raised spots on the cornea in cats?

Treatment depends on the cause of the spots, but may include drug therapy to reduce inflammatory conditions and infection, as well as protective eye ointments. In severe cases, surgical intervention may be necessary.

7. Can raised spots on the cornea disappear on their own?

In some cases, smaller spots may heal on their own, especially if they were caused by a minor injury. However, veterinary monitoring is important to avoid complications.

8. Are there home remedies for treating raised spots on the cornea in cats?

Home remedies should be avoided, as they can worsen the situation or cause infection. It is always advisable to consult a veterinarian to ensure the right treatment.

9. How can you prevent raised spots on the cornea in cats?

Good eye care and avoiding injuries from sharp objects or aggressive playmates can help reduce the risk of corneal damage. Regular veterinary check-ups are also important to detect problems early.

10. Is special care required after treatment of raised spots on the cornea?

After treatment, special care instructions, such as regularly administering eye drops or wearing a protective collar, may be required to support healing and prevent further injury.