To Prepare The Prism For Use; Remove Perkins Mk3 Tonometer From Case; Doubling Prism; To Insert Prism Into Prism Holder - Haag-Streit CLEMENT CLARKE OPHTHALMIC Perkins Mk3 Manuel D'instructions

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5. To Prepare the Prism for Use

Remove Perkins Mk3 Tonometer from case

5.
1
Remove the Perkins tonometer from the carrying case by holding the main body. Under no
circumstances should it be lifted by the prism holder (Fig 1, 4).

Doubling Prism

5.
2
The doubling prism (Fig 1, 5) should be prepared for use by cleaning following the cleaning
instructions supplied with the prisms.

To Insert Prism into Prism Holder

5.
3
1. Lean the Tonometer back until the
prism holder moves forward. (Fig 4a)
2. Gently pinch together the
arm securing buttons) (Fig 4a) on either
side to hold the prism holder in position.
N.B. Failure to follow these instructions could result in severe damage being
caused to the instrument.

Tonosafe Disposable Prism

5.
4
Alternatively, Tonosafe disposable prisms may be used. These are supplied as sterile single
use items to help eliminate the risk of cross infection.
Tonosafe and the prism holder have the same mass as the original doubling prism, so no
conversion of results is required. The disposable prism can be inserted in the same manner
as above.
17
prism holder
Tonogrip Tonogrip
Fig 4a
Tonogrip (
Fig 4b
3. With Tonogrip (cone arm buttons)
pressed and the prism holder out
(Fig 4b) the prism can be pushed
into place.
cone
prism