Manual Measurement; Automatic Measurement - Zeiss VISUREF 100 User Manual

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Operation of the device
• Adjust the height of the chin rest so that the test eye is level with the
reference marking for optimum eye level (2, Fig. 4).
• Look at the monitor and move the joystick until you see an image of the
test eye.
• Move the joystick towards or away from the test eye until a bright dot
(5, Fig. 9) appears near the center.
• Focus on the test eye by moving the joystick forward and backward so
that the kerato ring image (4, Fig. 9) is displayed clearly on the monitor.
As soon as the test eye is adjusted a blue line (1, Fig. 9) will appear above
the outer ring mark.

Manual measurement

• MANU is shown in the top left corner of the display to indicate the
manual mode.
• Press the measurement button on top of the joystick. If the measurement
has failed the message RETRY appears on the screen. In this case
readjust with the joystick and repeat this step.
• Check whether the measured diopter value corresponds to the
specification of the test eye. The diopter value is shown in the bottom
area of the eye.

Automatic measurement

• Press the AUTO button.
• The MANU icon in the top left corner of the screen is switched to AUTO.
• Automatic measurement begins when the eye is well focused.

Due to the tolerances of the test eye and the normal tolerances for
objective refraction, the reading on the VISUREF 100 may differ
from the value printed for the test eye.