What is Tonometry?
A tonometry is a test used to measure the pressure inside the eyes. This type of test is done to detect signs of glaucoma ahead of time. Glaucoma is an eye disease wherein fluid builds up in the eye. This fluid nourishes and bathes the eye but when it drains too slowly, pressure builds up. These changes are usually painless and so can remain unnoticed for a long period. Tonometry helps detect these eye changes.
How is Tonometry done?
Tonometry tests come in various methods. One is the electronic type that’s done by placing the tip of a tool that looks like a pen directly on your cornea. Another is the applanation or goldmann tonometry wherein a small probe is used to gently flatten a part of your cornea. The force required to flatten the cornea corresponds to the amount of pressure in the eyes. This type of tonometry test is considered very accurate.
Non-contact or air-puff tonometry meanwhile makes use of a puff to flatten the cornea.
Who needs Tonometry Tests?
People who may be at risk for glaucoma and hence would need tonometry tests are those ages 60 and above, with a family history of the disease, are diabetic, are nearsighted or suffering from other eye conditions or injuries.
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