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00040_Field_40.txt
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1997-10-29
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810b
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21 lines
PICTURE TAKING
Alignment and focusing:
Press the button on the top of the
joystick on the videokeratometer to
activate the unit. An image will come up
on the screen. Using the joystick move
the instrument side to side to align the
image of the eye. Move the instrument in
and out to focus the eye. The ring at the
base of the joystick is rotated to adjust
the vertical alignment.
The flashing light should be in the center
of the box. The faint laser light
reflections are thensuperimposed on the
square as well by focusing in and out.
With all three are aligned have the
patient blink to form a good tear film and
then fixate again and not blink, make any final focusing adjustment, then press the button on the top of the joystick.