The cornea is a see-through tissue that covers the eye. Pannus, (also known as Chronic Superficial Keratitis), is inflammation of the cornea. It is not painful, but will affect your dog’s vision.
Left untreated, pannus can end in blindness.
Pannus occurs mainly in German Shepherds, but it can occur in other breeds.
CAUSES:
Pannus is immune-mediated (the immune system fights the cornea).
It can be triggered and aggravated by other things, including:
Ultraviolet light
Pollution
Smoke
High altitude
SIGNS:
Typically, both eyes are affected.
First, you will notice a pink film on the eye
As pannus progresses, the film will spread and turn brown
Eventually, there will be vision loss
Other signs you may notice:
Excessive tearing
Opaque cornea
Thickened, pink third eyelid
DIAGNOSIS:
Diagnosis is usually based on medical history and signs.
To rule out other diseases, your veterinarian may perform the following tests:
Biopsy of the cornea
Corneal staining with fluorescein
Intraocular pressure testing (IOP): checks for glaucoma
Schirmer tear test: checks for tear deficiency
TREATMENT:
Pannus can not be completely cured, but is controllable. Treatment will stop the disease from progressing, and may reverse some of the damage.
Treatment may include:
Cortisone: either applied on the skin or injected by your veterinarian
Antibiotics: drugs to suppress the immune system, or to treat any secondary infections
Surgery: in cases where the dog is blind, the top layers of the cornea can be removed
Radiation: may be an option for advanced pannus
PREVENTION:
Pannus itself is not preventable, but you can try to prevent relapses.
Affected dogs should:
Limit exposure to bright sunlight (special sunglasses are available to protect your dog’s eyes)
Limit walks to early morning, evening, or shady areas
PROGNOSIS:
Life-long treatment is often necessary. You must follow your veterinarian’s instructions with giving medication. Following up with your veterinarian is also important because they may need to adjust the medication.
Most dogs respond well if you give the medication correctly.
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