Keeler D-KAT Z, Instructions For Use Manual

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15
EN
D-KAT Z-Type Tonometer by KEELER
• The LED reading is the ocular pressure expressed in mmHg.
8. PROBLEM SOLVING
8.1 THE FLUORESCEIN RING IS TOO WIDE OR TOO NARROW
Cause:
The fluorescein semicircles are too wide.
The measuring prism was not dried after
cleaning, or the eyelids came into contact
with the measuring prism during
measurement. The pressure reading is higher
than the real intraocular pressure.
Correction:
Move the slit lamp back and dry the
measuring prism with a wad of sterile
cotton wool or lint free cloth.
Cause:
The fluorescein semicircles are too narrow.
The lacrimal fluid has dried during
prolonged measurement. The pressure
reading is lower than real ocular pressure.
Correction:
Move the Slit Lamp back and ask the
patient to close his / her eyes once or twice,
then repeat the measurement procedure.
Figure 2: Correct Final Position