Variation in the action spectrum of erythrolabe among deuteranopes

M. Alpern, Edward N Pugh Jr

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Eight deuteranopes matched a mixture of a monochromatic light on the long wave side of the neutral point and a violet (450 nm) primary to a fixed white as well as a monochromatic light on the short wave side of the neutral point mixed with a red (650 nm) primary, to the same white. For λ > 530 nm, the former set of matches defined the action spectrum of the long wave sensitive foveal cones, and for λ < 480 nm, the latter that of the short wave sensitive cones. It is suggested that the visual pigment in the foveal long wave sensitive cones of different deuteranopes (and of different normals) may have different extinction spectra. The idea is consistent with microspectrophotometric measurements of rhodopsin in individual rods from different frogs (Bowmaker, Loew and Liebman, 1975).

Original languageEnglish (US)
Pages (from-to)613-646
Number of pages34
JournalJournal of Physiology
Volume266
Issue number3
StatePublished - 1977
Externally publishedYes

ASJC Scopus subject areas

  • Physiology

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