The existence of cells sensitive to three different wavelength ranges was confirmed over a century later in a 1983 experiment by Dartnall, Bowmaker, and Mollon, who obtained microspectrophotopic readings of single eye cone cells.
The existence of cells sensitive to three different wavelength ranges was first shown in 1956 by Gunnar Svaetichin Svaetichin, G. (1956). In 1983 it was validated in human retinas in an experiment by Dartnall, Bowmaker, and Mollon, who obtained microspectrophotopic readings of single eye cone cells.