Who actually found three types of cones in the retina?
A) Young and Helmholtz
B) Hering
C) Wald and Brown
D) Smith and Wesson

Question

Who actually found three types of cones in the retina?
A) Young and Helmholtz 
B) Hering
C) Wald and Brown 
D) Smith and Wesson

Quizplus · Accepted Answer

Wald and Brown are credited with discovering the existence of three types of cones in the retina through their research in the 1940s and 1950s using microspectrophotometry. While Young and Helmholtz proposed the trichromatic theory of color vision, they did not directly discover the three types of cones. Hering is known for his opponent-process theory of color vision, which conflicts with the trichromatic theory. Smith and Wesson are a gun manufacturer and have no relation to the discovery of cones in the retina or color vision.

Who Actually Found Three Types of Cones in the Retina