Tonometry

Purpose

• The test is often part of a routine eye exam.
• To monitor treatment for glaucoma.
• Tonometry can be used to determine whether medication is keeping your intraocular pressure below a set target pressure determined by your doctor.

What the risks are?

• The test might make you feel like blinking, but it does not cause any pain.
• There is a small chance the cornea may be scratched.
• There is also a very slight risk of an eye infection or an allergic reaction to the eyedrops used to numb the surface of your eyes.

How to prepare for the test?

• Tell your doctor if you or someone in your family has glaucoma or risk factors for glaucoma.
• Tell your doctor if you are taking any drugs.
• Do not smoke marijuana for 24 hours before the test.
• A topical anesthetic is applied to the eyes.
• Do not drink alcohol for 12 hours before the test.

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