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5-6 Retroillumination Mode
The retroillumination mode is available in cases such as where measured values
vary or the confidence level is low. This mode facilitates observation in the optic
media.
1. Press key several times until the
“PUPIL” LED goes on.
The retroillumination mode is selected and the
screen changes accordingly.
Once in the retroillumination mode, the
fixation target illumination automatically
changes to LOW.
2. Press the start switch.
The center bright spot becomes lit.
Since the extraocular illumination (the light
illuminating the iris and other extraocular
area) goes out, you must set the instrument
in the position beforehand from where the
inside of the pupil can be observed. Any
foreign objects, such as opacity in the crystal
lens, that obstruct the measuring beam,
appear as black shades on the screen.
•
A better view may result by shifting the
image off center. In particular, an opacity
existing in the center can only be seen by
projecting light off the opacity.
•
Do not expose the patient's eye to external
light (such as illumination from a
fluorescent tube) as that may lead to a
deterioration of visibility.
3. Press the start switch to restore the condition
given in Step 1.
4. Press key to return to the original condition.
•
The power automatically switches off after 3 minutes from starting
observation with the Retroillumination Mode.
•
When the Retroillumination Mode is used, the instrument does not
make an R/L judgment.
