Purpose. The appearance of a stimulus depends on its background, with high-contrast
backgrounds resulting in lower perceived contrast. Increased perceptual surround …

It is well established that many visual functions deteriorate with age. Perhaps counter-
intuitively, a recent study revealed that older people actually require less time to discriminate …

Most natural visual tasks involve the extraction of visual features from suprathreshold
contrast backgrounds, hence an understanding of how ageing impacts on contrast …

We studied iso-and cross-orientation surround modulation of perceived contrast (contrast-
contrast phenomenon) with a contrast-matching method. Our results indicate (1) iso-oriented …

The perception of a visual stimulus can be markedly altered by spatial interactions between
the stimulus and its surround. For example, a grating stimulus appears lower in contrast …

Purpose. To determine if age differences in contrast detection thresholds extend to
suprathreshold contrast discrimination. Methods. Psychophysical contrast detection and …

Purpose: The purpose of this study was to study how, in midperipheral vision, aging affects
visual processes that interfere with target detection (crowding and surround suppression) …

A variety of visual capacities show significant age-related alterations. We assessed
suprathreshold contrast and brightness perception across the lifespan in a large sample of …

Visual contextual effects enable inference regarding neural mechanisms of cortical function,
principally because of similarities between the stimulus properties influencing human …

The illusion of simultaneous brightness conhast was used to investigate age changes in
contrast sensitivity under suprathreshold conditions. Contrary to findings for threshold …