Haag-Streit Perkins MK3 Manual De Instrucciones página 23

5.73 Inaccurate Vertical Centering
Result
A semi circular ring
appears partly in the
upper half
The ring appears
completely in the
upper half
The ring appears
almost completely
in the upper half,
and partly cut in the
lower half
Two partly cut rings
appear, the larger
one in the upper half
Correct position: The
edges of both semi
circular rings meet
exactly in the centre
of the ocular
Image in ocular Cause
The measuring prism
is not focused on the
eye. The eye is too
far up.
The measuring prism
is not focused on the
eye. The eye is still too
far up.
The measuring prism
is not focused on the
eye. The eye is still too
far up.
The measuring prism
is not focused on the
eye. The eye is still too
far up.
The measuring prism
is focused precisely
on the eye.
en
Correction
Move the tonometer
upwards.
Move the tonometer
upwards.
Move the tonometer
upwards.
Move the tonometer
upwards.
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