Kawasaki K, Yonemura D, Nakazato H
Ophthalmic Res. 1984;16(6):329-33. doi: 10.1159/000265339.
The electroretinographic rapid off-response, composed mainly of the late receptor potential of cones, is found to be abnormal in all protans and deutans so far tested. The rapid off-response can thus be used as an objective measure in the diagnosis of congenital red-green colour defect.