Zeiss HUMPHREY 720i, Руководство пользователя

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3-22 SETTING-UP TESTS
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER II -
i
series
How well your patient understands the test procedure and how comfortable he or she is while
taking the test directly influence the reliability of the test results.
Patient instructions for
Explain the test procedure clearly and completely. Answer all patient questions before starting.
static testing
Use the following patient instructions as a guide, but remember to tailor your instructions to
the patient’s individual needs.
“This test will measure your central and side vision. It is important that you always look
straight ahead at the steady yellow light (Point to yellow fixation light). Other lights will flash
one at a time off to the side. Some will be bright, some dim. Press the button whenever you see
one of these lights (Give patient the response button). You are not expected to see all of them.”
(For threshold tests: “The test is designed so that you may see fewer than half of them.”)
“If you want to rest, hold down on the button (demonstrate to patient). The test will resume
when you release the button. We test one eye at a time. Blink normally so your eye does not get
dry. A good time to blink is whenever you push the response button.”
Note: Instructions for Kinetic Testing differ slightly. See Section 11 for details.
Occluding the
Position the eye patch over the non-test
non-test eye
eye so that it completely blocks vision, as
shown in the illustration. Make sure nothing
interferes with the vision of the test eye. For
example, if the patch is secured with an elastic
band, position the band above the eyebrow of the
test eye as shown.
Seating the patient
To increase test reliability, take all steps
necessary to ensure patient comfort:
• Adjust the table height.
• Adjust the seat height.
• Slide the instrument towards the patient.
• Check that the patient is relaxed and holding the response button.
Dimming the room lights Testing with the HFA II should be performed in a dimly lit room. Enough light should be
present for the safety of the user and patient. Any light present during testing should be
directed away from the patient and the HFA II bowl opening. Positioning the HFA II away from
light sources is suggested. Light from doorways or external light sources should be avoided.
Should the room lighting be very bright, the HFA II will post a warning and not allow
testing to continue without the lights being lowered.
PREPARING THE
PATIENT
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