ULTRAVIOLET SENSITIVITY OF 3 CONE TYPES IN THE APHAKIC OBSERVER DETERMINED BY CHROMATIC ADAPTATION

Sensitivities at 5.5 deg off-fovea from the aphakic observer superimpo sed on orange, purple and blue fields were obtained to estimate short- , middle- and long-wavelength cone spectra respectively. The middle-wa velength mechanism had a visible wavelength maximum resembling a nomog ram plus an UV sensitivity fitting a cis-peak. The short (and, to a le sser extent, the long) wavelength cone sensitivities are higher in the UV than expected.