Application guidelines for Reference Image measurement
000000-1865-713-GA-en-US-080622
Stray light from local light sources or lateral sunlight
Lateral illumination from local light or reflection sources or from lateral
illumination when the sun is low can lead to local reflections or stray light in
the sclera.
Fig. 13 Lateral stray light prevents vessel detection
Error message: "Please use side covers."
Lateral illumination generates local reflections in vessels near the limbus.
Accurate detection of vessels near the limbus is not possible.
Correct adjustment of the side covers on the head rest prevents reflections in
the sclera.
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