In addition, this instrument allows the examiner to find early cataracts, corneal scars, and other problems associated with the front structures of the eye. Your eye doctor will place drops into your eye to widen the pupil. This allows a better view of the retina. After the examination, your close-up vision may remain blurred for several hours. A standard test that determines the fluid pressure inside the eye.
Elevated pressure is a possible sign of glaucoma, a common eye problem in people with diabetes.
Before a tonometry, you may have a topical anesthetic applied to your eyes. After the procedure, do not rub your eyes for 30 minutes. Instead, it blows a puff of pressurized air into your eye and records the amount of pressure. The tonometer is then placed against your anesthetized cornea. This test looks for glaucoma and other factors that may affect your fields of vision.