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00166_Field_166.txt
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1997-10-29
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738b
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KERATOMETER MEASURING TECHNIQUE
Aligning the Instrument
Next look through the eyepiece
and sweep the instrument side
to side to find the reflection of
the mires from the cornea and
to horizontally align the
instrument. The proper
alignment is when the crosshair
is in the center of the
lower-right (center) circle. To
achieve the proper vertical
alignment, use the controls
described on the previous screen.
When this alignment is achieved,
lock the instrument so it will not move up or down or from side to side (lock knob on left side).
The movie shows aligning the instrument to take a measurement as previously described as well as showing how to rotate it for axis.