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GENERAL INFORMATION ON USAGE AND MAINTENANCE
OPERATION PRINCIPLES
Ocular Pressure Measurement:
By ejecting air from the measuring nozzle to the cornea, detect by a pressure sensor the
internal cylinder pressure required for the cornea to reach a prescribed deformed state (with a
certain plane area), and calculate the ocular pressure value by computing. Irradiating the
cornea by near infrared light using a Z alignment LED, receive the reflected beam by an
applanation sensor and detect the cornea reaching a prescribed deformed state (with a
certain plane area).
Cornea Thickness Measurement (only in CT-1P):
The slit light is projected onto the patient eye at a slant, and the corneal thickness is mea-
sured in reflected light from the corneal surface and corneal endothelium.
Auto Mode:
By illuminating the cornea using an XY alignment LED and a Z alignment LED, compute the
reflected cornea image information received by the CCD camera unit and detect positions of
the cornea and instrument. Based on the detected information, drive the X-axis drive motor, Y-
axis drive motor and z-axis drive motor and move the main body to a position suitable for
measurement. Detect that the main body is placed at a position suitable for measurement,
measure the ocular pressure.
After finishing the measurement one eye, the main body, running the previously set distance,
moves to the other eye, and starts detecting the positions of the cornea and instrument.
*In the case of manual mode, operations of main body movement and ocular pressure mea-
surement are done by tapping the buttons displayed as software on the control panel.
Applanation sensor
Measuring nozzle
Cornea
Z alignment LED
Measuring nozzle Outer cover
Pressure sensor
Solenoid
Piston
Cylinder
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