KERATOMETER MEASURING TECHNIQUE

Aligning the Instrument

If the keratometer is too high 
or low in relation to the 
patient’s eye, the body of the 
instrument can be moved up or 
down with the knob that is 
closest the the examiner near 
the base.  Be sure the lock of
 the left side is loosened which 
allows the instrument to move 
up and down.  If the body of the 
keratometer is near upper or 
lower limit of its movement, 
the patient can be raised or lowered by moving the chinrest up or down using the knob in front of the one to raise and lower the instrument body.