3-9
3) When measurement has been finished, the message of "Fin-
ished" is displayed in the screen. If auto shot is active, it
will be released from its activated state.
<Countermeasures for measurement problems>
In case measurement is unable or the error message is dis-
played for measurement results, the following problems are
possibly caused. The following will be the countermea-
sures to be taken for such problems.
y Blinking or nystagmus
Advise the Patient to look at the fixation target with his
eye to be examined and again start measurement. If auto
shot does not work due to nystagmus with severe eye
movement, press the Measurement Switch & in good tim-
ing with the Target light Spot ' as being viewed, so mea-
surement is thereat taken (by manually measurement). If,
however, correct positioning is not been made, measure-
ment deviations will possibly be caused. Such manually
measurement should be used only when you have to give
measurement even in an unstable condition.
y Interfering the minimum pupil diameter ring with the eye-
lid or the eyelash
Instruct the Patient open his eye widely until measure-
ment ends, or again take measurement by lightly lifting
the Patient's upper eyelid with the examiner's finger.
y A small pupil
If the pupil is smaller than the minimum pupil ring diam-
eter (, cause may not proper measurement.
y Corectopia
If the pupil interferes the minimum pupil diameter ring
(, cause may not proper measurement. If so, release the
Auto-alignment Function and next take measurement in
the position that the concentricity of the pupil and the
target ring ) is made.
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(Fig. 3)
3.3 MEASUREMENT
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