Intraocular inflammation (“anterior uveitis”) is a relatively common problem in cats. The eye will become cloudy and the iris will appear darker or more reddish-brown in colour. This condition requires intensive topical treatment with anti-inflammatory medications to prevent serious complications, such as glaucoma, which may lead to blindness and even loss of the eye. Very often an intensive work-up and search for the underlying cause is necessary, including serologic investigation for cat-specific viral diseases (particularly Feline Leukemia Virus, Feline immunodeficieny virus and Feline Coronavirus) which all may cause inflammation inside one or both eyes.