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In this example too little infrared light is reflected from the retina.
Monocular measurement was previously set on the start screen. If the camera then
detects two pupils, the measurement is canceled.
h) Corneal reflexes are too dark!
Cause:
This error message is displayed if the pupillary reflexes are too dark.
Reason:
The measurement takes place with infrared light, which is reflected from the
cornea. Where insufficient light is reflected from the cornea, a measurement
cannot be performed.
Tip:
Darken the examination room so that the pupils become larger and more infrared
light is reflected to the camera.
i)
Monocular: Cover OS!
Cause:
This error message is displayed if the software detects two pupils in the camera
image, in monocular measurement mode.
Reason:
Although the software can distinguish between the left and the right eye, one eye
must be covered to avoid any possibility of confusion (e.g. "OD" selected but "OS"
to be measured).
Tip:
In the case of squinting patients, the fixing eye can be measured without covering
the eye with the squint if the camera is positioned in such a manner that only the
fixing eye is visible in the camera image (that is, only one half of the patient’s face).
For monocular measurement of the squinting eye, however, the fixing eye must be
covered so that the squinting eye fixes the camera.