Abstract

Detecting the position of the gap in a Landolt C is adversely affected by black bars placed tangential to the C and at a certain distance from it. The maximum bar separation affording interaction is proportional to the minimum angle of resolution, even in cases of amblyopia where resolution is presumably not limited by optical spread of the image. It is suggested that this contour interaction is related to the size of the receptive field (and hence to the resolving capacity) associated with the retinal region used to fixate the target.

© 1963 Optical Society of America

Foveal contour interaction: detection and discrimination

Oliver Ehrt and Robert F. Hess
J. Opt. Soc. Am. A 22(2) 209-216 (2005)

Optical and Motor Factors in the Formation of the Retinal Image*

Gerald Westheimer
J. Opt. Soc. Am. 53(1) 86-93 (1963)

On Some Aspects of Real and Apparent Visual Movement*

C. H. Graham
J. Opt. Soc. Am. 53(9) 1019-1025 (1963)

Foveal contrast thresholds exhibit spatial-frequency- and polarity-specific contour interactions

Oliver Ehrt, Robert F. Hess, Cristyn B. Williams, and Khurram Sher
J. Opt. Soc. Am. A 20(1) 11-17 (2003)

Factors in Human Visual Resolution*

Gordon L. Walls
J. Opt. Soc. Am. 33(9) 487-505 (1943)