For questions regarding the visual system, which serves to transduce light energy into neural impulses, or regarding visual perception, how we interpret such incoming visual information.

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10
votes
2answers
525 views

What is the “static” in human vision called?

Sort of like a cheap digital Camera, the human eye has certain feedback that's perceived but doesn't actually exist in the real world; a little layer of Static that's especially noticeable in pitch ...
6
votes
1answer
276 views

How much red/orange is needed to stimulate hunger?

A common claim thrown around is that red and orange are great for restaurants because it stimulates hunger. However, I've heard time and time again that this does not work in web design because you ...
11
votes
1answer
342 views

Under what conditions does 60hz video produce visual artifacts?

There are some important thresholds of frame rate in video playback that effect whether or not animation appears fluid. This wikipedia page about Visible Frame Rate suggests that a framerate of 60 ...
4
votes
1answer
56 views

Asaccadia adaptation

Can asaccadia (i.e., lack of saccades, due to neuronal or muscular damage) be overcome? Do other muscles (e.g., neck) compensate? Are the resulting gaze patterns the same as for saccades, and are they ...
7
votes
1answer
1k views

Is Apple's iPhone Retina Display really accurate to human eye resolution?

Apple based their Retina Display on the following claim, as cited by Wikipedia: The display has a contrast ratio of 800:1. The screen is marketed by Apple as the "Retina Display", based on the ...
13
votes
2answers
314 views

What concepts of perception should designers be aware of when designing?

Visual perception is a huge topic, much of which is relevant to the work of a designer. I have identified topics in visual memory, visual cognition and colour perception that are relevant, and I'm ...
10
votes
2answers
298 views

How does the brain act on the information gained via eye saccades?

I've often heard that the process of saccading can be described as a statistical sampling technique. Specifically, the standard textbook definition of the function of saccades seems to be that the ...
11
votes
1answer
421 views

What is the current status of tetrachromacy in humans?

Tetrachromacy is a condition of having four colour channels. There is a hypothesis that some women posses 4 different types of cone cells (each with different opsin responsible for different ...
11
votes
1answer
222 views

How do humans control saccades?

I've gathered the standard rational for a visual system utilizing saccades from perception textbooks: the neural cost of processing an entire scene at a high level of detail would be prohibitive, but ...
9
votes
3answers
818 views

Simulate colorblindness in non-colorblind individuals

Is there any way by which individuals with normal color vision could "see" the effects of Deuteranopia or any of the common colorblindness types, say by using special lenses or anything? Color ...
25
votes
3answers
16k views

Why would the brain flip the images perceived by your eyes?

The following is a common scientific statement, which you don't have to google long for to find: The eye views images upside-down in the manner of a camera lens, but our brains reinterpret this ...
10
votes
3answers
1k views

Is it possible to improve reading speed and visual comprehension by doing exercises?

Background I'm trying to capture detailed information from the images in my visual memory, mainly text. My daily life requires reading many documents on varying topics. I want to increase my reading ...
5
votes
3answers
132 views

Are there any cognitive models for visual navigation?

I've seen a few neuroscience accounts of visual navigation and many A.I. projects, but no psychologically plausible accounts that actually solve the computational problem (i.e. produce a working ...
22
votes
3answers
336 views

Why does the human visual system produce a bright patch after staring at a bright light source and looking away?

If a person looks at a bright light source, such as a light bulb or perhaps the sun for a period of time, and then looks away and closes their eyes, they typically see a bright patch in the shape of ...