Keeler KAT R, Instructions For Use Manual

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15
EN
KAT R Type and T Type Tonometer by KEELER
Cause:
Excessive pressure has been applied.
Correction:
Reduce pressure until the semicircular
images come closer together and finally
the inner margins align with each other, as
shown in the last illustration.
Correct final position
The inner margins of the fluorescein
semicircular images are aligned and
touching each other.
8. GENERAL INFORMATION AND SUGGESTIONS CONCERNING
MEASUREMENT
IMPORTANT NOTE
Measurement must be performed as quickly as possible on each eye. Should epithelial drying
be observed, we recommend the patient’s acuity and visual fields should be examined.
The pressure measurement procedure may be repeated several times. Nervous or anxious
patients often have higher intraocular pressure during the first measurement procedure.
It has been found that pressure decreases during the first few minutes of the procedure, when
the patient realises that the tonometric examination does is not unpleasant. When correctly
anaesthetised and with their eyes fully open, the patient will feel absolutely nothing. Therefore
we recommend running a preliminary measurement procedure on each eye, the results of
which need not be taken into consideration. After completing the preliminary procedure, run
three measurement procedures on each eye. These readings will be correct if the pressure has
stabilised. When the measurement procedures are performed correctly, the results of the
subsequent measurements will vary by only about 0,5 mmHg.
When the measurement procedure for one eye is prolonged excessively, a drying phenomena
will occur on the corneal epithelium of both eyes.
A ring of fluorescent deposits will form around the cornea contact surface and around the
measuring prism on the eye being examined. The other eye will show fluorescent dry areas,
resembling a map, which will hinder and make measurement unreliable.
The eye will rapidly recover from any corneal dryness without the need for any treatment, visual
acuity may be temporarily affected by fine epithelial defects.