Tonometer SW-500

rebound tonometryhand-held

The rebound tonometer uses an innovative patented technology for sensing rebound. After the probe is inserted into the tonometer, it is magnetized to produce N/S poles. The instantaneous current of the solenoid in the instrument (for about 30 milliseconds) generates an instantaneous magnetic field, which makes the magnetized probe move towards the cornea at a speed of 0.2 m/s (the same Principle of extreme repulsion). The probe hits the front surface of the cornea, decelerates, and rebounds. The control switch monitors the solenoid voltage caused by the rebounding magnetized probe. The electronic signal processor and micro-sensor calculate the deceleration of the probe after it hits the cornea, and finally integrate the information. Converted into an intraocular pressure reading. The tonometer can obtain measurements within 0.1 seconds. If the intraocular pressure increases, the deceleration of the probe after impact increases and the duration of impact decreases. The rebound tonometer SW-500 has two working modes: vertical and horizontal, and can output print data wirelessly. The device uses the principle that the probe reacts differently when the probe hits the surface of objects of different hardness at a certain speed to measure the intraocular pressure. It has the advantages of high measurement accuracy, portability, no need for anesthesia, and no cross-infection.