Nidek Medical AFC-330, Руководство оператора

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148
MAINTENANCE : Troubleshooting
Auto tracking cannot be executed.
• The auto tracking may not be enabled (ON).
Enable the auto tracking and set Auto with the Auto/Manual
toggle button .
• If the patient’s eyelid is covering the patient’s eye, the black-and-white
required pupil diameter detection mark is displayed and the auto
tracking does not function.
In such a case, instruct the patient to open their eyes wider. If that is not
possible, raise the eyelid with a finger while paying attention not to
press the eyeball.
• Extraneous light may be exposed to the cornea.
(In such a case, the cornea-reflected spots cannot be detected and the
black-and-white required pupil diameter detection mark is
displayed.)
Reduce the light intensity of the room or install the device on another
location.
• The auto tracking may not function for eyes with keratoconus or
immediately after surgery.
(In such a case, the cornea-reflected spots cannot be detected and the
black-and-white required pupil diameter detection mark is
displayed.)
Perform manual alignment.
• The auto tracking may not function when movement of the eye or face
cannot be stopped.
In such a case, perform manual alignment.
Auto focus does not function.
• The auto focus may not function for eyes with eye diseases such as
cataract or severe myopia or hyperopia outside the range between − 12 D
and +15 D.
In such a case, adjust the focus using the focus knob.
See “
 If auto focus is not activated” (page 64).
Auto shot cannot be executed.
Images cannot be captured using the
release button.
• When the auto anti-misshooting button is enabled, image capture
cannot be executed with the auto shot or by pressing the release button if
the patient’s eyelid is detected or their pupil size does not satisfy the
required pupil diameter (minimum pupil diameter in Small pupil
photography mode) ( ).
• In such a case, instruct the patient to open their eyes wider. If that is not
possible, raise the eyelid with a finger while paying attention not to press
the eyeball.
• If image capture cannot be executed with the remedies above, disable the
auto anti-misshooting button , or set Manual with the Auto/Manual
toggle button , then perform image capture again.
Captured images are dark.
• Increase the flash intensity using the flash intensity up/down buttons, then
perform image capture again.
Quality of captured images is low.
Intense white-light flare appears in the
center.
• Check the cleanliness of the objective lens.
If it is not clean, clean it. (See “4.3 Cleaning Objective Lens” (page
155).)
Symptom Remedy