Ocular FIP

 Ocular Manifestations of Feline Infectious Peritonitis

Understanding Eye Involvement in Cats with FIP

Ocular FIP refers to the involvement of the eyes in cats affected by feline infectious peritonitis (FIP). Eye manifestations may occur as part of systemic FIP or, in some cases, may be the earliest noticeable clinical sign before other systemic symptoms become apparent.

Ocular involvement results from immune-mediated inflammation affecting ocular tissues, including the uveal tract, retina, and surrounding structures. Prompt recognition of ocular abnormalities is important for early clinical evaluation and supportive management.

 Common Ocular Signs

Cats with ocular FIP may exhibit one or more of the following signs:

• Uveitis (inflammation inside the eye)

• Abnormal pupil size or shape (anisocoria, irregular pupils)

• Reduced pupillary light response

• Cloudiness or opacity within the eye

• Intraocular hemorrhage

• Vision changes or apparent visual impairment

• Sensitivity to light (photophobia)

Ocular signs may affect one or both eyes and can progress over time.

 Diagnostic Considerations

Diagnosing ocular FIP requires a comprehensive ophthalmic and systemic evaluation. Eye signs alone are not sufficient for definitive diagnosis.

Common diagnostic approaches include:

• Complete ophthalmic examination, including slit-lamp and fundoscopic evaluation

• Measurement of intraocular pressure

• Ultrasound of the eye when internal structures cannot be visualized clearly

• Blood testing, including inflammatory markers and protein levels

• Imaging and systemic evaluation to assess concurrent wet or dry FIP

• PCR testing on ocular samples in selected cases (when clinically appropriate)

Differential diagnoses may include infectious uveitis, trauma, neoplasia, glaucoma, and immune-mediated eye disease.

 Clinical Management Overview

Management of ocular FIP focuses on:

• Preserving ocular comfort and visual function when possible

• Controlling intraocular inflammation

• Monitoring progression of systemic disease

• Supporting overall health and quality of life

Treatment strategies should always be determined by a licensed veterinarian or veterinary ophthalmologist based on individual patient evaluation.

 Prognosis and Monitoring

Visual prognosis varies depending on severity, response to therapy, and the presence of neurologic or systemic involvement. Some cats may maintain functional vision with appropriate management, while others may experience progressive ocular damage.

Ongoing monitoring may include:

• Regular eye examinations

• Assessment of vision and comfort

• Systemic disease surveillance

• Medication tolerance monitoring

 Authoritative References

This content is based on information from internationally recognized veterinary sources:

1. World Small Animal Veterinary Association (WSAVA) – Global FIP Guidelines

2. Cornell Feline Health Center – Feline Infectious Peritonitis Overview

3. Merck Veterinary Manual – Ocular Manifestations of FIP

4. Journal of Feline Medicine and Surgery – Peer-reviewed ophthalmic studies

 Medical Disclaimer

Important: All content on this page is provided for educational purposes only and does not constitute veterinary diagnosis, treatment, or medical advice. Always consult a licensed veterinarian for any health-related decisions concerning your pet.