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Questions tagged [visual-system]

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How is the “sampling time” of the human visual system influenced by things like hormones, metabolism, or our circadian rhythm?

For example people experience time passing slower when they are in a adrenalin rush. What is the mechanism behind it, and where can I read more about it ?
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1answer
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What parts of the visual system could be responsible for a fixed, monocular scotoma?

Light enters the cornea, crosses the lens, hits the retina. Electric sinal travels from retina through the optic nerve, reaches the chiasma, crosses and makes its way to the visual cortex. My ...
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Does octopus eye presents the equivalent of fovea in primates?

I'm working on a simple computational model of Primate eye: as we know, it presents a central part, the fovea, that is very rich of receptors in comparison with eye periphery. I'm wondering if other ...
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20/20 vision translated to resolution [closed]

What resolution and or DPI would a TV or VR headset need to be to equal 20/20 vision? and 20/10? With even the 4K TV it does not seem as sharp as my own vision.
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Do adult mosquitoes have color preferences?

Do adult mosquitoes get particularly attracted or repelled by any colour, or darkness or light? If so, what are they?
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1answer
71 views

What are the response frequencies of sensory neurons?

Both visual and auditory stimuli are sent to the brain via ganglion cells (retinal resp. spiral). Both are the first cells along their resp. pathways that produce action potentials. My question ...
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If we had children wear an apparatus swapping e.g. Red and Blue colors, would their perception adapt?

In the context of neuroscience and philosophy, one difficult question is what makes colors so peculiar and vivid if they're just signals encoding light intensity coming from certain receptors -- an ...
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1answer
1k views

Does light from the left visual field reach the temporal left retina?

A diagram of the visual pathway is shown here. Light from the left visual field reaches the left nasal retina and the right temporal retina. On the other hand light from the right visual field reaches ...
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How do the connections from V1 to V2 form during early development of the human brain?

I am wondering how corticocortical efferents from layer I and II in V1 develop to forward visual information to layer IV in V2. Is there topology preservation in these connections from the beginning ...
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1answer
858 views

Biological implementation of convolutional neural networks

In computer science, 'convolutional neural networks' are used, that are meant to be inspired by biological network structures like found in the human brain visual cortex. In the computer ...
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1answer
188 views

Flicker fusion threshold for insect eyes

I searched on bio-numbers for flicker-fusion threshold of insect eyes in general and for flies in particular. Ruck, 1961 gives values for some flies. Is there any database maintained for these values? ...
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What processes are responsible for focusing on an image only seen by one of the eyes?

When a person is spying from around a corner with only one eye, it's rather easy to ignore the other eye's image, since it's probably much darker, because one usually spies around a corner standing ...