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.