Anterior Uveitis in Dogs
Uvea is the dark tissue at the front of the eye that contains blood vessels. When the uvea becomes inflamed, the condition is referred to as anterior uveitis (literally, inflammation of the front of the eye). This painful condition can occur in both cats and dogs, and affects the animal's iris and the surrounding pupil tissue, which in turn, might threaten your pet's vision.
Symptoms and Types
- Pain
- Redness of the eye
- Excessive tears
- Discharge
- Squinting
- Pupil is small or has an uneven shape
- Swelling of the eyeball
- The front of the eye is cloudy or dull
- The color of the iris may be uneven or may be different than normal
Causes
- Anterior uveitis may be due to different causes, including:
- Autoimmune diseases
- Tumors
- Cancers
- Trauma or injury
- Metabolic diseases
- Lens protein entering into the eye fluid
- Infections:
- Parasites
- Fungi
- Bacteria
- Toxoplasmosis (a multi-system disease caused by a parasite)
- Rickettsia (a parasitic disease found in many ticks, fleas and lice)
Viruses are another cause of anterior uveitis in both animals, however, the viral agents are different for each species. In cats, feline leukemia, feline immunodeficiency, and feline infectious peritonitis viruses all bring on anterior uveitis, while canine herpes virus, canine distemper virus and canine adenovirus can cause the condition in dogs. It is important to note, canine adenovirus-1 can be prevented with a vaccine.
Diagnosis
Your veterinarian will want a complete medical history and will conduct a physical examination, usually using a special instrument to look at the eye (ophthalmoscope). The front of the inside of the eye, as well as the back part, will be examined to measure the pressure within the eye. The veterinarian will also order a complete blood count and a biochemical profile. This will be used to identify any autoimmune diseases, infectious organisms, or other diseases. Other tests for diagnoses include ultrasounds and X-rays of the eye, as well as an aspirate from the eye for microscopic examination.
Treatment
The course of treatment will depend on the diagnosis. However, this generally consists of prescribed drops or ointments to put in the animal's eye, as well as oral medications to reduce any pain or inflammation.
Specific treatment will be recommended depending on the cause of the disease. For example, if infection is found, an antibiotic topical drug will be prescribed. If the underlying cause is a fungus, anti-fungal drugs will be prescribed.
In extraordinary and rare situations (e.g., if there is a tumor causing secondary complications such as glaucoma), the veterinarian may recommend surgically removing the eye.
Living and Management
Pay attention to all of your veterinarian’s instructions. Putting medication in a pet's eye can be challenging, but it must be done for the sake of your animal. Take time every day to look at your pet’s eye carefully and look for any changes. Follow-up appointments are needed so that the veterinarian can examine the eye at regular intervals.
It is also important to check the environment your pet lives in. Is it possible that it is contracting an infection -- especially a fungal infection -- there? You may need to make some changes in your animal's accommodations.