HiScan Touch
Installation and Operation Manual
OPTIKON 2000
Code 14101XEN
5-1
2014-09-02 Rev.B
5
GENERAL INFORMATION
The piezoelectric effect in natural crystals was observed for the first time by Pierre
and Jacques Curie in 1880, who proved that, when deformed due to mechanical
causes, some types of crystals (quartzes, tourmaline) produced an internal electric
field. Vice versa, the application of an electrical field caused the mechanical
deformation of the material. If appropriately treated with a polarisation process, some
ceramic materials are able to acquire the piezoelectric properties of natural crystals.
These materials that are obtained with an innovative technology are called
piezoelectric ceramics. Biometry probes have a piezoelectric ceramic component that
"vibrates"
at a frequency of 10 megahertz (10 million oscillations per second) when
an electric pulse is applied. This movement of the ceramic transducer generates an
ultrasound wave with an ultra-low energy that passes through the cornea, aqueous
humour and other objects or tissues that are within the signal propagation path. Part
of the ultrasound wave passes through the obstacles, while part of it is reflected back
to the source (that is the transducer). The reflection of this energy back to the
transducer requires some time, which is proportional to the distance of the obstacle.
The measurement of this time and the experimental acquisition of the echo speed
enable to mathematically calculate the distance between the object (for example the
retina) and the emitter (probe tip). The characteristics of the return echo are then
processed by a fast micro-processor that verifies if they are reliable for measuring
purposes (automatic acquisition).
5.1 SYSTEM DESCRIPTION
Echograph A/Bscan HiScan - OPTIKON 2000 - is a device is designed to be used to
perform echographies of the eyeball, measure the axial length of the eye and
calculate the IOL that is more appropriate to restore emmetropy after cataract
removal. This device owes its uniqueness to its reliability, versatility, accuracy and
easiness of use combined with an appealing and functional design. Its main controls
can be managed using the footswitch, touch-screen, mouse or keyboard.
