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Published in Dee H. Andrews, Robert P. Herz, Mark B. Wolf, Human Factors Issues in Combat Identification, 2010
Heather F. Neyedli, Lu Wang, Greg A. Jamieson, Justin G. Hollands
Participants Twenty-six University of Toronto students with normal visual acuity were recruited. Complete data were collected from 24 participants and used for analysis. To take part in this experiment, each participant was required to pass a visual acuity test (measured with a Snellen eye chart), and an ocular dominance test (measured using the Porta Test; Roth, Lora, and Riley 2002). Each participant was paid $30 CAD for participating, and a bonus $10 CAD was given to the top performer.
Vision System
Published in Joseph D. Bronzino, Donald R. Peterson, Biomedical Engineering Fundamentals, 2019
Aaron P. Batista and George D. Stetten
Other cells, more common than simple cells, are termed complex cells. Complex cells also respond to bars within their receptive eld, but unlike simple cells, they are invariant to the position of the bar within the receptive eld. is may contribute in part to the translation invariance of our visual experience. Complex cells will respond to movement perpendicular to the orientation of the edge. Some prefer one direction of movement to its opposite. Some complex and simple cells are end-stopped, meaning they re only if the illuminated bar or edge terminates within the cell’s receptive eld. Presumably, these cells detect corners, curves, or discontinuities in borders and lines. End-stopping takes place in layers 2 and 3 of the primary visual cortex. From the LGN through the simple cells and complex cells, there appears to be a sequential processing of the image. A remarkable feature in the organization of V1 is binocular convergence, in which a single neuron responds to identical receptive elds in both eyes, including location, orientation, and directional sensitivity to motion. is does not occur in the LGN, where axons from the le and right eyes are still segregated into dierent layers. Some binocular neurons are equally weighted in terms of responsiveness to both eyes, while others are more sensitive to one eye than to the other. V1 is also organized into columns containing cells in which one eye dominates, called ocular dominance columns. Ocular dominance columns occur in adjacent pairs, one for each eye, and are prominent in predatory animals with forward-facing eyes, such as cats, chimpanzees, and humans. ey are nearly absent in rodents and other prey animals whose eyes face outward.
Dark mode vogue: Do light-on-dark displays have measurable benefits to users?
Published in Ergonomics, 2022
Before the experimental tasks, participants were tested for normal visual acuity using a Snellen eye chart. The chart was placed on the wall and participants performed the test 10 feet from the chat. Participants also performed a simple ocular dominance test to determine their dominant eye using the thumb test (Heiting 2000). In this test, participants were asked to extend one arm in front of them and place their thumb on a target. Then, participants were asked to close one eye at a time. The eye that keeps the thumb directly in front of the target while the other eye is closed is the dominant eye.