Vision Testing--The Right Way
Look into the instrument and note what happens when the eye switches are ON and OFF.
Experiment with viewing FAR point slides at NEAR point and vice versa, by dialing through all 12
slides. First, view all slides in the FAR point mode, and then repeat in the NEAR mode. Note that
FAR test slides viewed at NEAR are upside-down, as are the NEAR test slides viewed at FAR. It is
important to recognize whatever the subject may be describing and be able to answer any questions.
Concentrate on acquiring a smooth delivery of instruction and description of the test target, as well
as confidence in handling the instrument. The tester's administrative expertise can
help relax the
subject, achieve cooperation, and a more accurate response.
When speaking to the subject, never act surprised or provoked by their response or lack of
response. Give the subject every opportunity to demonstrate his/her best vision.
If the subject normally wears glasses or contact lenses, he/she should wear them during the testing
to determine whether or not his/her prescription is still adequate.
Select a table or counter of convenient height with sufficient surface space for the instrument and
the
recording of these results. Normal room lighting is acceptable, but care should be taken to avoid
light
shining on the lenses or on the subject's face.
IMPORTANT CHECKPOINTS:
- Be certain the instrument is plugged into a 110
to
120
V
AC
or a 240 V to DC power + 24 V outlet
.
- Adjust instrument to proper height for subject's comfort by depressing button on base and moving
the housing.
-
Before the instrument is turned on, the dial must be rotated so that the number '1' is located
under
the FAR indicator. This must be done each time the unit is turned on.
- Push power switch on back of instrument to activate the instrument.
- Tear off headrest tissue, so a clean tissue is ready for the subject.
- Be certain the subject presses their forehead against the headrest activator so the illumination in
the unit is activated and the GREEN "READY" indicator on the control panel is lit.
- Be certain the subject is comfortable.
- Be certain to have a clean record form and a scoring marker.
You are now ready to test
8
Summary of Contents for Optec 5000G INT
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