Intellipuff Service Manual
Page 7 of 51
Issue D 27/02/2014
EP59-12317
intelliPuff - Principles of Operation
The intelliPuff handset is positioned in front of the eye being tested until it fires
the solenoid valve releasing a pulse of air which rises in pressure with time
and causes the surface of the eye being examined to deflect.
This deflection is monitored by the optical sensors within the handset and the
pressure noted for a given deflection. This is then translated from the internal
pressure curve to an inter-ocular pressure measured in millimetres of
mercury.
During calibration the unit’s internal curve is standardised by storing a number
of parameters determined during the calibration process by firing the handset
automatically against a calibrated pressure transducer. The values of these
parameters compensate for variations in the speed of operation of the
solenoid valve and the variations in the pneumatic path from one unit to
another.