Page 25 - JSOM Fall 2019

FIGURE 1 Example of “disappearance” of white letter print on a red background under dimmed red light conditions. The upper third of
the vial’s medication label has a bright red background with white letters printed on it, stating the contained drug and drug concentration
(propofol 20mg/mL). The text is clearly visible in daylight and in white light mode of the head lamp (A) but disappears under red light
condition (B). Photo taken in the medical (passenger) compartment of our Airbus H-135 HAA helicopter at night, illuminated only with a
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commercial head lamp (Black Diamond ).
(A) (B)

FIGURE 2 Example of complete “disappearance” of red letter print on a white background under dimmed red light conditions. The two
photographs show the same section of the medical (passenger) compartment of our Airbus H-135 HAA helicopter. (A) Taken in daylight.
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(B) Taken in darkness, illuminated by a commercial head lamp (Black Diamond ) in red light mode.
(A) (B)

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