Pet Eye Care - Tonovet - Big Lick Veterinary ServicesThis tool is used to accurately measure intraocular (eye) pressure on animal patients, as it is painless and therefore creates no anxiety. The probe will gently use repetitive rebound touches to contact your pet’s cornea; these touches are so light that they are often not even noticed by the pet. Results will help guide the veterinarian in a full eye exam for your pet and show any pre-disposition or signs of glaucoma in your pet.