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Different types of Tonometer
from How An Ophthalmologist Gets An Accurate IOP Pressure With The Tonometer: Types and Tips To Use
by Jhon Goodwin
Contact tonometry
Tono-Pen (Reichert): A hand-held instrument provides the reading with a plunger that extends from a footplate and encounters the cornea. The plunger and footplate both encounter resistance when they contact the cornea.
A reading of the accuracy percentage will also be included in the readout. They are transportable, simple to operate, and beneficial for people who struggle to sit behind a slit lamp.
Icare ic100 tonometer: Icare ic100 tonometer price is the same as that of the tonopen device. It measures the rebound speed of a small magnetized probe.
Rapid measurement makes taking pressureless traumatic for patients who dislike drops, such as children or patients with developmental disabilities, so the patient does not require anesthetic drops.
Pneumotonometer (Reichert): This technique employs a silicone tip with windows that float on a stream of air and exerts increasing air pressure until it reaches the same level as the anterior chamber pressure.
Non-contact tonometry
This instrument is commonly referred to as the “air-puff” tonometer. It is excellent for use during screenings since it is precise in normal pressure ranges, does not require anesthetic drops, and requires less technical knowledge.
