What is a normal tonometer reading?

What is a normal tonometer reading?

A normal result means your eye pressure is within the normal range. The normal eye pressure range is 10 to 21 mm Hg. The thickness of your cornea can affect measurements. Normal eyes with thick corneas have higher readings, and normal eyes with thin corneas have lower readings.

How accurate is schiotz tonometer?

Our study demonstrated that the Schiotz tonometer may be a useful tool to measure IOP in keratoprosthesis eyes and is more accurate than the Tono-pen, with an absolute median error of 5.4 mm Hg or less compared with true IOP determined by digital manometry.

How accurate is rebound tonometer?

Both the iCare tonometer and NCT displayed excellent sensitivity of 98.3% (90–99%, 95% CI) and 90.8% (90–99%, 95% CI), respectively. Our results demonstrate that the iCare rebound tonometer is an accurate instrument to screen for intraocular hypertension.

What is the price of a tonometer?

How Much Does Tonometers cost? The prices of some instruments can be as low as 650 USD or less, while the newest, high-tier systems may cost as much as 15000 USD.

What is normal range for IOP?

Normal eye pressure ranges from 12-22 mm Hg, and eye pressure of greater than 22 mm Hg is considered higher than normal. When the IOP is higher than normal but the person does not show signs of glaucoma, this is referred to as ocular hypertension. High eye pressure alone does not cause glaucoma.

How do you read a tonometer?

All tonometer reading values are reported in mmHG, which means millimeters of mercury. These are the units used to document your patient’s eye pressure. If your patient’s tonometer reading value comes back with a reading over 20 mm HG, they may have pre glaucoma or glaucoma.

Are handheld tonometers accurate?

Conclusion: The handheld non-contact tonometer has the same accuracy and reliability of measurement of intraocular pressure comparing with Goldmann applanation tonometer, and it can be used in glaucoma clinic and screening.

How does Icare tonometer work?

Icare tonometers are portable, handheld devices used to measure IOP. They assess the deceleration and rebound time of a small, lightweight probe, which makes brief contact with the cornea and can be used without local anaesthesia.

How does Icare tonometry work?