Canon CX-1 Operation Manual page 55

Problem
Sharp images cannot be
taken.
Black points appear on
photographed images in
the same area.
White spots appear on the
images.
Cause
The pupil is not dilated enough.
The positioning is not correct.
The image is unfocused.
Eyebrows or eyelashes are
blocking the pupil.
The patient's eye is opaque.
The patient blinked when the
image was taken.
The flash intensity, diopter
compensation lever, and
viewfinder diopter compensation
ring have not been adjusted.
The objective lens is dirty.
The patient is wearing contact
lenses.
Dust or other substance is
adhering to the surface of the
objective lens.
Dust or other substance is
adhering to the surface of the
imaging sensor of the digital
camera.
The objective lens is dirty.
A patient's eyelashes have
appeared on the images.
-43-
7. Daily Inspection and Maintenance
Remedy
Make the patient's pupil dilate. If the
pupil is still too small, press the small
pupil photography switch to activate the
small pupil function.
Perform positioning.
Focus the image.
Instruct the patient to open his or her eye
wider.
A sharp image cannot be taken.
Take another image.
Adjust the settings.
Clean the lens (see page 44).
Instruct the patient to remove his or her
contact lenses.
Clean the lens (see page 44).
Perform a self-cleaning (see page 52).
Note: The imaging sensor is very
sensitive. Contact a Canon
representative or distributor for
cleaning it.
Clean the lens (see page 44).
Instruct the patient to open his or her eye
wider. Take another image.