-Light-adaptive algorithms~architectures are proposed for regularization vision chips. The adaptation mechanisms allow the regularization parameters to change in an adaptive manner in accordance with the light intensity of given images. This is achieved by adaptively changing the conductance values associated with massively parallel resistive networks. The algorithms/architectures are inspired ...

Erratum to ‘‘Effects of horizontal and vertical additive disparity noise on stereoscopic corrugation detection’’ [Vision Research 41 (2001) 3133–3143] q Stephen Palmisano *, Robert S. Allison , Ian P. Howard c a Department of Psychology, University of Wollongong, Wollongong, NSW 2522, Australia b Department of Computer Science, York University, Toronto, Ont., Canada, M3J 1P3 c Centre for Vision...

Figure 1. Intraoperative photo showing the displaced fracture fragment. DESCRIPTION A 55-year-old white man presented with double vision 2 days after low-velocity blunt force–isolated facial trauma. He complained of persistent vertical and horizontal double vision, particularly with inferior and lateral gaze. He had minimal dentition, but he believed that his teeth aligned normally. A computed ...

We report a family in which autosomal dominant congenital nystagmus cosegregates with a balanced 7;15 translocation. Ophthalmic investigation showed predominantly horizontal nystagmus with a small rotatory component and no significant loss of visual function. This finding suggests a possible localisation for autosomal dominant congenital nystagmus (McKusick 164100).

PURPOSE The contrast sensitivity function (CSF) provides a detailed description of an individual's spatial-pattern detection capability. We tested the hypothesis that the CSFs of people with low vision differ from a "normal" CSF only in their horizontal and vertical positions along the spatial frequency (SF) and contrast sensitivity (CS) axes. METHODS Contrast sensitivity for detecting horizo...

Zebrafish are tetrachromats with red (R, 570 nm), green (G, 480 nm), blue (B, 415 nm), and UV (U, 362 nm) cones. Although neurons in other cyprinid retinas are rich in color processing neural circuitry, spectral responses of individual neurons in zebrafish retina, a genetic model for vertebrate color vision, are yet to be studied. Using dye-filled sharp microelectrodes, horizontal cell voltage ...

PURPOSE To determine whether there are significant differences in standard clinical measures of vision, progressive addition lens (PAL)-specific vision tests, or subjective ratings and preferences between customized free-form and standard non-free-form PALs in an experienced wearing population. In addition, we aim to determine whether subjective or objective clinical outcomes depend on demograp...

In a series of conceptual articles published around the millennium, Carl Woese emphasized that evolution of cells is the central problem of evolutionary biology, that the three-domain ribosomal tree of life is an essential framework for reconstructing cellular evolution, and that the evolutionary dynamics of functionally distinct cellular systems are fundamentally different, with the informatio...

BACKGROUND The visual system can adjust itself to different visual environments. One of the most well known examples of this is the shift in spatial tuning that occurs in retinal ganglion cells with the change from night to day vision. This shift is thought to be produced by a change in the ganglion cell receptive field surround, mediated by a decrease in the coupling of horizontal cells. MET...