Advertisement

Is tonometry an effective screening test for glaucoma?

In tonometry, a device (a tonometer, such as the air puff device) measures intraocular pressure (IOP). Unfortunately, no one knows whether elevated IOP is an accurate indicator of either current or future glaucoma. As many as 70% of those with high IOP never have vision problems caused by glaucoma. Also, single measurements of IOP are not particularly good indicators of glaucoma. When IOP is measured on a random basis, only half of all patients who have glaucoma also have IOP at the "ocular hypertension" level (over 21 mm Hg). There is no single cutoff value for IOP that can be used as a guideline when screening for glaucoma.

Continue Learning about Glaucoma Diagnosis

What are screening tests for glaucoma?
RealAgeRealAge
Three tests are commonly available to screen for glaucoma: tonometry, ophthalmoscopy, and perimetry....
More Answers
What is a perimetry (visual field) test for glaucoma?
Laura C. Fine, MDLaura C. Fine, MD
Perimetry, also called a visual field test, is used to diagnose glaucoma (a group of eye diseases th...
More Answers
How is glaucoma diagnosed?
Dr. Mehmet Oz, MDDr. Mehmet Oz, MD
A tonometry, the typical initial test for glaucoma, involves measuring intraocular pressure after nu...
More Answers
How often should a person have a screening exam for glaucoma?
Louis B. Cantor, MDLouis B. Cantor, MD
It is important to monitor the eye pressure closely if it is elevated (normal is generally betwe...
More Answers

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.