Canon CX-1 User Manual
Page 56
7. Daily Inspection and Maintenance
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Non-mydriatic observation mode (Color Photography, Red-free
Photography, and Cobalt Photography)
*Flare is colorless in the Red-free and Cobalt photography mode.
Sharp images cannot be
taken.
The pupil is not dilated enough.
Dilate the patient’s pupil. If the pupil is
still too small, press the small pupil
photography switch to activate the small
pupil function.
The positioning is not correct.
Perform positioning.
The image is unfocused.
Focus the image.
Eyebrows or eyelashes are
blocking the pupil.
Instruct the patient to open his or her eye
wider.
The patient’s eye is opaque.
A sharp image cannot be taken.
The patient blinked when the
image was taken.
Take another image.
The flash intensity, diopter
compensation lever, and
viewfinder diopter compensation
ring have not been adjusted.
Adjust the settings.
The objective lens is dirty.
The patient is wearing contact
lenses.
Instruct the patient to remove his or her
contact lenses.
Black spots appear on
photographed images in
the same area.
Dust or another substance is
adhering to the surface of the
objective lens.
Dust or another substance is
adhering to the surface of the
imaging sensor of the digital
camera.
Perform a self-cleaning (see page 65).
Note: The imaging sensor is very
sensitive. Contact your sales
representative or local Canon
dealer for cleaning it.
White spots appear on the
photographed images.
The objective lens is dirty.
The patient’s eyelashes have
appeared on the images.
Instruct the patient to open his or her eye
wider. Take another image.
Problem
Cause
Remedy
The image contains flare.
The retinal camera and the eye
are not aligned.
Align them correctly. If the alignment does
not eliminate the flare, consult the
following remedies and take another photo.
White flare appears on the
edges.
The distance between the retinal
camera and the subject’s eye is
too far.
Move the objective lens closer to the
subject’s eye.
Orange* flare appears on
the edges.
The distance between the retinal
camera and the subject’s eye is
too close.
Move the objective lens farther away
from the subject’s eye.
Flare appears on the left.
The retinal camera is positioned
too leftward.
Move the objective lens to the right.
Flare appears on the right. The retinal camera is positioned
too rightward.
Move the objective lens to the left.
Problem
Cause
Remedy
000_L-IE-5169D_CX-1.book Page 56 Monday, July 29, 2013 10:42 AM