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.