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Conscious visual perception without V1.
We used the technique of PET to determine whether visual signals reach visual area V5, specialized for visual motion, when a human patient, blinded by a lesion in area V1, discriminates the directionExpand
Human visual responses in the absence of the geniculo-calcarine projection.
This paper describes an investigation of responses elicited by flashed and moving light stimuli presented to the 'blind'half-field of a hemianopic subject. The detection mechanism is significantlyExpand
Spatial and temporal response properties of residual vision in a case of hemianopia.
Residual vision in subjects with damage of the primary visual cortex (striate cortex) has been demonstrated in many previous studies and is taken to reflect the properties of known subcortical andExpand
Parameters affecting conscious versus unconscious visual discrimination with damage to the visual cortex (V1).
When the visual (striate) cortex (V1) is damaged in human subjects, cortical blindness results in the contralateral visual half field. Nevertheless, under some experimental conditions, subjectsExpand
Pattern of neuronal activity associated with conscious and unconscious processing of visual signals.
Following striate cortex damage in monkeys and humans there can be residual function mediated by parallel visual pathways. In humans this can sometimes be associated with a "feeling" that somethingExpand
Supplementation with the carotenoids lutein or zeaxanthin improves human visual performance
Background:  Macular pigment (MP) is found in diurnal primate species when vision spans a range of ambient illumination and is mediated by cone and rod photoreceptors. The exact role of MP remains toExpand
Exploring Eye Movements in Patients with Glaucoma When Viewing a Driving Scene
Background Glaucoma is a progressive eye disease and a leading cause of visual disability. Automated assessment of the visual field determines the different stages in the disease process: it would beExpand
Variation of chromatic sensitivity across the life span
Thresholds were measured along three directions in color space for detecting an equiluminant color change of a set of bars embedded in a larger field of spatio-temporal achromatic noise for observersExpand
Visual processing levels revealed by response latencies to changes in different visual attributes
Visual latencies, and their variation with stimulus attributes, can provide information about the level in the visual system at which different attributes of the image are analysed, and decisionsExpand
Colour constancy and conscious perception of changes of illuminant
A sudden change in illuminant (e.g., the outcome of turning on a tungsten light in a room illuminated with dim, natural daylight) causes a "global" change in perceived colour which subjects oftenExpand