Figure 10.

Three-dimensional color signatures of blue ON, ON midget, and OFF midget cells. The preferred azimuth and elevation of each cell was computed from its preferred [x, y, z] vector in Cartesian coordinates, as generated from its preferred vectors across the three individual stimulus planes (see Fig. 9). Blue circles, blue ON cells; white circles, ON midget cells; black circles, OFF midget cells. Black/blue circles denote OFF midget cells initially identified as S cone sensitive in Figure 1.