Figure 3. Spectral sensitivity of dark-adapted eye (white) and after chromatic adaptation with blue light (blue line) in a species with a single blue visual pigment.
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Chromatic Adaptation

Spectral sensitivity of a dark-adapted eye (white) and after chromatic adaptation with blue light (blue line) in a species with blue and violet visual pigments.

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Credit

mage courtesy of Journey into Midnight: Light and Life Below the Twilight Zone.