Opponent-processing effects on the field spectral sensitivity of pattern-elicited electroretinograms.

Abstract:

:Field spectral sensitivities of the pattern-elicited electroretinogram (PERG) were obtained from two subjects using a modified version of Stiles' two-color increment threshold procedure. A 540 nm checkerboard test pattern of 38 degrees dia was alternated at 8 Hz on a uniform adapting field of the same size. Test intensity, field wavelength and field intensity were varied parametrically. The derived field spectral sensitivity does not resemble that of any individual class of cones; it roughly approximates the photopic luminosity function V lambda, but with sensitivity dips at 540 and 600 nm, which may be associated with an adaptation of the red/green (R/G) opponent site. Thus, it is proposed that the PERG reflect activities in both the luminance and the R/G opponent channels.

journal_name

Vision Res

journal_title

Vision research

authors

Wu S

doi

10.1016/0042-6989(92)90064-p

subject

Has Abstract

pub_date

1992-11-01 00:00:00

pages

2031-41

issue

11

eissn

0042-6989

issn

1878-5646

pii

0042-6989(92)90064-P

journal_volume

32

pub_type

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