The normal IOP is 10 to 25 mmHg. Tonometry is the technique used to measure the IOP. Glaucoma can be defined as a raised intraocular pressure that affects the health of the optic nerve. Most dogs presenting with glaucoma have an IOP greater than 40 mmHg. It is very important that glaucoma is recognized very quickly to give the eye any chance of saving its vision.

Further Information for Vets