Tonometry is a quick and simple test that checks ... New fluid is constantly being made and old fluid drained out. But if this drainage system gets plugged, the fluids build up.

The Biro Schiotz Tonometer is used to measure and monitor intraocular pressure in the eye. Portable for emergency readings. Durable design U.S. Certification by AAO specifications. Includes 4 weights.

The TRK-1P features a complete Auto Alignment system, combined with an Auto Refractometer, Keratometer, Non-Contact Tonometer and Pachymeter. Kerato-Refractometer, Non-Contact Tonometer and ...