We view the world with two eyes and yet are typically only aware of a single, coherent image. Arguably the simplest explanation for this is that the visual system unites the two monocular stimuli into a common stream that eventually leads to a single coherent sensation. However, this notion is inconsistent with the well-known phenomenon of rivalry; when physically different stimuli project to t...

BACKGROUND Prior findings suggest that poor readers tend to have poor visual skills, but few reports give full frequency distributions of skill variables, and little data are available for adolescents. METHODS Visual skills and visual acuity were measured in 461 students (average age 15.4 years) in 4 California high schools within the same school district. Participating students had been iden...

conclusions the x-intercepts (point at which the fdc crosses the x-axis) were on average more in the base-in direction, y-intercepts (point at which the fdc crosses the y-axis) were shifted in the exo direction, and slopes were steeper in the symptomatic group. results there were more subjects with exo fixation disparity than eso fixation disparity in the study sample. the means for fixation di...

purpose : patients with infantile or childhood strabismus who do not achieve visual axes alignment early in life are believed to have poor prognosis with respect to the stereopsis. this study investigates the binocularity and stereopsis following delayed surgical alignment in patients with congenital and early-onset strabismus. patients & methods : 36 patients aged between 6-30 years participat...

WHEN orthoptic treatment was first practised it was thought that, if it were applied in cases of non-paralytic strabismus where there was good visual acuity in each eye, restoration of normal binocular function would invariably result. In the early 1930s it was not unusual for children suffering from squint to be subjected to countless sessions of treatment with reflecting stereoscopes in the h...

Binocular rivalry occurs when dissimilar images are presented to corresponding retinal regions of the two eyes: visibility alternates irregularly between the two images, interspersed by brief transitions when parts of both may be visible. We measured event-related potentials (ERPs) following binocular rivalry by changing the stimulus viewed by one eye to be identical to that in the other eye, e...

When stimuli presented to the two eyes diier considerably, stable binocular fusion fails, and the subjective percept alternates between the two monocular images, a phenomenon known as binocular rivalry. The innuence of attention over this perceptual switching has long been studied, and although there is evidence that attention can aaect the alternation rate, its role in the overall dynamics of ...

An influential theory of the function of early processing in the visual cortex is that it forms an efficient coding of ecologically valid stimuli. In particular, correlations and differences between visual signals from the two eyes are believed to be of great importance in solving both depth from disparity and binocular fusion. Techniques such as independent-component analysis have been develop...

We examined how the binocular visual system behaves during perceptual filling-in. In these experiments an initial filled-in target was replaced with an interocularly matched (fusible) or unmatched (rivalrous) target immediately after the disappearance of the initial target induced by perceptual filling-in. We measured the times for the target to recover from the filling-in. We found that recove...