CLC OPHTHALMOMETER MEASURING TECHNIQUE

Focusing the Eyepiece

Before taking a measurement the 
eyepiece should be focused.   Place 
the occluder before the objective 
and then looking through the 
eyepiece the crosshair will be seen.  
The eyepiece should be rotated 
counter-clockwise until the crosshair 
blurs, then rotated back clockwise 
until the crosshair just comes into focus.

If different clinicans use the ophthalmometer this should be done each time it is used.  If the same person uses it all the time the focus only needs checked periodically.  If only one practitioner uses the instrument then a set screw can be tightened to prevent the eyepiece from being accidently turned and defocused.