glaucoma in dogs wGlaucoma is caused by Increased pressure within the eye. The increased pressure can rapidly cause blindness, and also pain. 

It is hard to assess pain in animals, but we find that nearly all our patients are brighter, more active after having glaucoma relieved. Humans described the pain like having a bad headache; you can function, but not happily.

The normal pressure within the eye is 10 to 25 mm Hg. When the pressure is increased (usually > 30 mm Hg) a diagnosis of glaucoma is made. We measure the pressure in the eye (intraocular pressure - IOP) with a tonometer.

Once the eye becomes enlarged the eye is blind.

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