achromatic vision

What are the neural mechanisms of achromatic vision in the invertebrate visual system and how do they correspond to the neural mechanisms of brightness perception in vertebrates?

Geometric model of achromatic vision in the snail based on responses of B- and D-cells

Comparison of the independently constructed models of achromatic vision based on psychophysical data from the human (Figure 2 B), behavioral and neurophysiological studies in lower vertebrates and mammals (Evtikhin et al.

Dvukhkanal'naya model' akhromaticheskogo zreniya lyagushki [Two-channel model of achromatic vision in frog].

Neural mechanisms of chromatic and achromatic vision.