Is Tonometry Accurate

The Goldmann applanation tonometer (GAT) is considered accurate, highly reliable, and simple to use. Moreover, this instrument is extremely well established in clinical use and research.

How accurate is tonometer?

The iCare tonometer is slightly more accurate measuring pressure in the normal range than in the high or low ranges, similar to the traditional air puff method, Dr. Mothershed said. “If you get a really high pressure – 28 mm Hg to 32 mm Hg – then sometimes it tends to read a little higher than it actually is,” he said.

How accurate is eye pressure measurement?

On statistical grounds, a cut-off value of 21 mmHg is widely used to differentiate between normal and abnormal IOP. Measurement of IOP is assumed to be accurate, with the Goldmann applanation tonometer becoming the international gold standard for IOP measurement.