Canon Cr-2 User Manual

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Flow of Operation 
The flow of operations for retinal photography is as follows. 
Connect the cables if necessary as described in “Connecting Cables” (see page 22). 
 
Preparing for an examination (page 22)
Setup for patient (page 24)
Alignment (page 25) 
Small pupil photography (page 30) 
x2 photography (page 30) 
Diopter compensation (page 31) 
Anterior eye photography (page 32) 
Photography (page 28) 
Finishing an examination (page 29)
4
 Basic Operations           
						

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4 Basic Operations
Connecting Cables 
Connect the CR-2 to a computer in which the Rics NM 2, the supplied software, has been installed. 
 WARNING•	Do not plug or unplug the power plug with wet hands.
•	 Do not use any power cord other than the supplied.
Otherwise, fire or electric shock may result.
1 Make sure that the power switch for the CR-2 is turned off. 
2 Connect the power cord and the USB cable to the 
retinal camera. 
3 Insert the power plug all the way into an AC outlet. 
4 Connect the other end of the USB cable to the USB connector of the PC. 
Use a high-speed AB type USB cable that is 3 meters or shorter. For details, contact the Canon 
representative or distributor from whom you purchased the CR-2. 
Preparing for an Examination  
 CAUTION•	 To prevent the risk of infection, wipe the forehead rest with ethanol solution or any other 
disinfectant whenever changing patients. For details on how to disinfect, consult a specialist.
•	 To ensure cleanliness, replace the chin rest paper whenever the patient is changed.
1 Turn on the computer and start the Rics NM 2. 
2 If the digital camera is off, turn the switch to the ON or 
 position.   
						

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23
3 Remove the objective lens cap, and turn the retinal 
camera's power switch to the ON position. 
The POWER lamp lights and the set lamp blinks. 
The CR-2 automatically does an initialization sequence (internal 
check and initialization of driving parts). After the initialization 
the parts of the main unit stop in their center positions. 
CAUTIONThe main unit and the chin rest move to the center position when the CR-2 is turned on. Do not 
touch the main unit and the chin rest while they are moving. At the same time, keep the patient’s 
chin away from the chin rest.
Power-saving function 
If the power is on and the buttons on the operation panel are not operated for over 10 minutes, the 
power-saving function is activated. The POWER lamp blinks while in power saving mode. 
To return to normal mode, press any button on the operation panel, move the stage right or left, or 
turn the diopter compensation knob. 
4 Make sure the diopter compensation knob is in the 0 
position. 
You can also check the position of the diopter compensation knob on the observation monitor. 
5 Press and hold the unlock button and slide the stage 
lock to the UNLOCK side. 
Align the mark on the stage lock and the mark on the left side 
of the base. 
The stage lock is released. 
6 Move the stage towards you with the operation lever.   
						

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4 Basic Operations
7 Disinfect the forehead rest and replace the chin rest paper. 
If chin rest paper is not being used, disinfect the chin rest also. 
 CAUTION•	To prevent the risk of infection, wipe the forehead rest with ethanol solution or any other 
disinfectant whenever changing patients. For details on how to disinfect, consult a specialist.
•	 To ensure cleanliness, replace the chin rest paper whenever the patient is changed.
Setup for Patient 
1 Start an examination on the Rics NM 2. 
Enter the patient’s information. 
The set lamp lights and the observation monitor turns on. 
2 Seat and position the patient. 
•	Instruct the patient to remove their contact lenses or glasses, if they are wearing them. 
•	 Have the patient place their chin on the chin rest and their forehead against the forehead rest. 
Adjust the heights of the optical bench and chair so the patient is comfortable. 
3 Move the chin rest with the CHIN REST button so that the patient's eye is aligned with 
the height adjustment mark. 
 
Chin rest rises 
Chin rest lowers  Height adjustment 
mark 
4 Move the stage toward the eye to be photographed. 
 CAUTION•	
Do not place your hands or fingers on the base.
•	 Instruct the patient not to place the patient’s hands and fingers there.
Otherwise, your or the patient’s hands or fingers may be pinched, possibly resulting in injury.
Hold the operation lever, pull it toward you, and then move the 
stage.   
						

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25
Alignment 
1 Align the retinal camera with the eye to be photographed. 
 CAUTIONWhen adjusting the position of the retinal camera in the front-back direction, slowly bring the main 
unit closer to the patient while looking at the patient’s eye from the side. The patient’s eye may be 
injured if the objective lens makes contact with it.
1.  Move the stage until the eye to be photographed appears in the observation monitor. 
2.  Adjust the center of the patient's pupil and the pupil alignment circles. 
3.  Have the patient stare at the green blinking internal eye fixation lamp. 
Pupil alignment circles 
When examining the anterior eye of a patient who is extremely near or far sighted, the patient may 
not be able to see the internal eye fixation lamp. 
•	To move the main unit slightly to the left or right, tilt the 
operation lever to the left or right. 
•	 To move the main unit slightly to the front or back, tilt the 
operation lever to the front or back. 
•	 To move the main unit up or down, turn the main unit 
vertical movement ring. 
When the vertical position cannot be fully adjusted by using the operation lever 
Adjust the height of the chin rest with the CHIN REST button to raise or lower the patient's face.   
						

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4 Basic Operations
2 Tilt the operation lever forward or backward to unify the top and bottom of the image of 
the pupil. 
When the pupil is smaller than the inner pupil alignment circle 
Darken the room further to dilate the patient's pupil more. If the patient's pupil does not dilate 
enough, use the small pupil photography function (see page 30). 
3 Press the alignment button. 
The retina appears in the observation monitor and the internal 
eye fixation lamp blinks for three seconds. 
4 Adjust the observation light brightness with the 
observation light brightness button. 
Guidelines for observation light brightness 
Adjust to the lowest possible brightness level to reduce the strain on the patient's eye. 
Observation monitor brightness adjustment 
Use the Rics NM 2 to adjust the brightness of the observation monitor. See the Rics NM 2 manual 
for details.   
						

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5 Have the patient stare at the internal eye fixation lamp to fix the part for the photograph. 
Take the following steps to guide the patient’s eye. Press the FIX TARGET buttons up, down, left, and 
right to move the internal eye fixation lamp to your desired position and then press the set button 
to make it blink. If the eye cannot be guided by the internal eye fixation lamp, use the external eye 
fixation lamp (sold separately). 
Set button 
Press the set button for over two seconds to reset the position of the internal eye fixation lamp. 
See the Rics NM 2 manual for details. 
6 Turn the focus ring to align the split lines into a single line. 
The image enlarges while the focus ring is being turned. 
Focus ring
Split line 
Correct
Incorrect
Incorrect
When the split lines do not align 
If the patient's diopter range is outside the –10 to +15 D, it is not possible to focus with the focus 
indicator. If this happens, use the diopter compensation function (see page 31), and focus the image 
so it looks sharp.   
						

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4 Basic Operations
Photography
1 Do a preliminary check before taking photos. 
a. The photography ready lamp lights green. 
b.  The working distance dots appear sharpest. 
c.  The working distance dots are on the extension line of the WD guides. 
d.  The split lines form a single line. 
a
b, c
d
Photography ready lamp 
•	Green: Ready to shoot. 
•	 Red: Preparing to shoot. Wait until the lamp lights green. 
•	 None: Cannot access the Rics NM 2. The retina observation mode is not established. 
Flash intensity adjustment 
The flash intensity is set to the standard level in advance. 
Every time the flash intensity button is pressed the flash 
intensity increases by 0.3 stop. 
2 Press the shutter release button. 
The image of the retina and the examination information appear on the Rics NM 2 screen. 
3 Check the photographed image. 
Check that the image is normal and there are no errors in the examination information. 
To take images of the other eye, repeat steps from step 1 of Alignment (see page 25).   
						

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Finishing an Examination 
1 Save the images on the Rics NM 2 and end the examination. 
The set lamp starts blinking and the observation monitor turns off. 
CAUTIONThe main unit and the chin rest moves to the center position when a study is finished with the 
control software. Do not touch the main unit and the chin rest while they are moving.
2 Align the stage with the base and slide the stage lock 
to LOCK side to lock the stage. 
Align the mark on the stage lock and the mark on the right side 
of the base.
3 Turn off the power to the CR-2. 
4 Exit the Rics NM 2 and turn off the computer.   
						

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The section describes how to use x2 photography, small pupil photography function, diopter 
compensation, and anterior eye photography and how to connect an external monitor when one is 
used. 
x2 Photography
You can take and save images that are within the x2 photography range on the observation monitor. 
1 Press the x2 photography button. 
The lamp on the x2 photography button lights, and the x2 photography indicator and x2 photography 
range marks appear on the observation monitor. 
x2 photography 
indicator
x2 photography 
range mark 
2 Take the image. 
The image in the x2 photography range appears on the Rics NM 2 screen. 
Small Pupil Photography Function
If the diameter of the patient’s pupil is smaller than the inner pupil alignment circle after waiting for 
a while in a dark room, use the small pupil photography function. When the function is used, pupil 
diameters 3.3 mm or larger can be photographed. 
1 Press the small pupil photography button. 
The lamp on the small pupil photography button lights, and the small pupil photography indicator and 
a dotted circle appear on the observation monitor. 
Small pupil 
photography indicator Effective range of 
photography 
5
 Photography Auxiliary Functions