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THE PERCEIVED SIZE OF TARGETS IN THE PERIPHERAL AND CENTRAL VISUAL FIELDS
Author(s) -
Bedell Harold E.,
Johnson Chris A.
Publication year - 1984
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1984.tb00345.x
Subject(s) - peripheral , foveal , peripheral vision , visual field , luminance , retinal , visual angle , optics , physics , medicine , ophthalmology
Previously described misperceptions of target size in the peripheral visual field have been conflicting. We found that whether an illuminated peripheral target appears larger or smaller than a foveal target of the same physical size depends upon luminance: in general, dim peripheral targets arc underestimated and bright peripheral targets are overestimated in size. We attribute misestimations of peripheral target size primarily 10 (he optical degradation of peripheral retinal images and propose a qualitative model for how image extent may be determined by the visual system.