A Tonometer measures the intraocular pressure of the eye which is the internal pressure of the eye. This Tonometry test for intraocular pressure is mainly performed for glaucoma. Glaucoma is a condition of the eye causing blindness by harming the optic nerve at the back of the eye. The damage to the optic nerve may be caused due to the accumulation of excess fluid that isn't able to drain out properly from the eye. The tonometer measures the intraocular pressure by monitoring the resistance ... Read more