Instruction To The Patient - Clement Clarke Perkins Mark 3 Manual De Instrucciones

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Preparing the Patient
6.
1
When seen through the viewing lens (Fig 2, 7
be clearly visible and appear equal in size, denoting that the contact point is central on
the cornea.
below zero.
Note:
is at its calibrated position i.e. when the rim of the prism holder is level with, or not
more than 1 mm above the case surface.

Instruction to the Patient

6.
2
light for this purpose.
It is recommended that patients are repeatedly asked to keep their eyes wide open during
the examination. If required, the lids of the examined eye may be held open by the
examiner's fingers provided that no pressure is applied to the eye.
19
- continued
Fig 6
(Fig 2, 9) is