“…Dark adaptation is usually thought of as a peripheral matter since "the mechanisms underlying light and dark adaptation are largely retinal in origin" (Dowling, 1987). However, contrary to observations that the sensitivities of the two eyes during dark adaptation are largely independent (Crawford, 1940;Buck & Pulos, 1987), several studies (Kravkov & Semenovskaja, 1933;Lansford & Baker, 1969;Paris & Prestrude, 1975;Makous et al, 1976;Makous, 1990) have shown that the sensitivity of one eye during dark adaptation can be influenced by the state of adaptation of the other. For certain stimulus configurations, monocular dark adaptation may proceed more rapidly when both eyes are initially light adapted than when the nontest eye is initially dark adapted and the test eye light adapted.…”