The fluid outflow pathway in the eye is commonly known as the drainage angle. For proper outflow, the angle needs to be open in a way that the fluid will flow through small holes, as in a sieve.

In breeds predisposed to glaucoma, there is usually a narrow angle or inadequate holes in the sieve (known as goniodysgenesis).

Symptoms of Glaucoma in Pets to look out for.

·  A red eye

·  A very squinty and painful eye

·  A lot of tearing

·  A dilated pupil that doesn’t react to light

·  A cloudy (whitish/blue) cornea (front surface of the eye)

·  A big, bulging eye (a condition known as buphthalmia)

·  Vision loss

Be especially vigilant during allergy season. If the redness persists more than a day or two, definitely take your pet to the vet.

Glaucoma generally only affects one eye initially. Depending on the cause, the other eye may be at risk for developing glaucoma in the future.

Many diseases can cause a red, squinty, teary and cloudy eye, but glaucoma should always be considered as a cause.

Frequently, when the pressure is high, pets are in a lot of pain and hold the eye closed or keep the third eyelid (a pink/red membrane) up over the eye, making it difficult to assess. (The third eyelid showing is often referred to as cherry eye)