Inaccurate Pressure - Haag-Streit CLEMENT CLARKE OPHTHALMIC Perkins Mk3 Manuel D'instructions

Inaccurate Pressure

9.
4
Result
The outer edges of
the fluorescein rings
touch each other
The fluorescein rings
coincide and form
a line
The fluorescein rings
do not touch each
other
Correct position:
The inner edges of
the fluorescein rings
touch each other
Fig 13
Image in ocular
Pressure is too strongly
reduced
The pressure is reduced
The pressure is too
strongly increased
Accurate pressure -
precise focusing of the
measuring prism
Cause
en
Correction
Increase the pressure by
turning the milled thumb
wheel.
Increase the pressure by
turning the milled thumb
wheel.
Reduce the pressure by
turning the milled thumb
wheel.
28