Peripheral vision is the reason as to why we can see about 180 degree’s out of our eyes. Peripheral vision or side vision detects objects outside the direct line of vision. For example, when someone is walking into the room or a car is coming up next to you, your peripheral vision tells you where to look. Central vision is when you are focused on one specific thing, reading this paragraph is an example, you are focused on one word within the sentence, paragraph, and page using your central vision.
In the back of your eye there is a light-sensitive lining called your retina. The light receiving cells are called your cone and rod cells. The central region of the retina is called the fovea. The cone cells are only sensitive to color and are most abundant in the fovea. The characteristic of having cone cells is that it gives you the sharpest view of an object. There are also three different types of cone cells, they would be: the short-wavelength sensitive cones, the middle-wavelength sensitive cones, and the long-wavelength sensitive cones or known as S-cone, M-cone, and L-cone. The cones are known of having three colors, red, green, and blue. The red makes up about 64 percent, green makes up about 32 percent, and blue makes up only 2 percent, based on measured response curves. The “blue” cones have the highest sensitivity, and are mainly found outside of the fovea. The “red” and “green” cones concentrate more on the fovea centralis (Hecht 2nd Ed, Sec 5.7).
Rod cells are better at finding and seeing objects in the dim light. Unlike cone cells rod cells are not sensitive to color. Rod cells are also responsible for your ability to detect objects moving toward you before you can focus on them, also they are very sensitive to motion...
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...couple seconds for it to re-adjust to the color it is seeing. So your cone cells don’t get too excited and go crazy. Part of the reason you need to have objects close to your face so you can see shape and color is so that you can also see them clearly. Some people with peripheral vision especially need objects close to their face due to having the problem they have with seeing different objects clearly.
Works Cited
• Color Vision & Art. (n.d.). In www.webexhibits.org. Retrieved March 24, 2014, from http://www.webexhibits.org/colorart/ag.html
• The Organization of the Retina and Visual System. (n.d.). Webvision . In webvision.med. Retrieved March 24, 2014, from http://webvision.med.utah.edu/book/part-xiii-facts-and-figures-concerning-the-human-retina/
• Science Buddies. (n.d.). In sciencebuddies.org. Retrieved March 25, 2014, from http://www.sciencebuddies.org/
The ultimate goal for a system of visual perception is representing visual scenes. It is generally assumed that this requires an initial ‘break-down’ of complex visual stimuli into some kind of “discrete subunits” (De Valois & De Valois, 1980, p.316) which can then be passed on and further processed by the brain. The task thus arises of identifying these subunits as well as the means by which the visual system interprets and processes sensory input. An approach to visual scene analysis that prevailed for many years was that of individual cortical cells being ‘feature detectors’ with particular response-criteria. Though not self-proclaimed, Hubel and Wiesel’s theory of a hierarchical visual system employs a form of such feature detectors. I will here discuss: the origins of the feature detection theory; Hubel and Wiesel’s hierarchical theory of visual perception; criticism of the hierarchical nature of the theory; an alternative theory of receptive-field cells as spatial frequency detectors; and the possibility of reconciling these two theories with reference to parallel processing.
The ‘where visual pathway’ is concerned with constructing three dimensional representations of the environment and helps our brain to navigate where things are, independently of what they are, in space in relation to itself (Mishkin & Ungerleider & Macko, 1983).... ... middle of paper ... ... The 'Standard' of the 'Standard'.
The high percentages of individuals who endure this impairment justifies and practically demands future research because the causes are not fully understood. The need for future research can be better emphasized if those with normal vision try to empathize with victims of macular degeneration. One can only imagine how frustrating it must be to receive sensatrions only in the periphery of the retina. Because the macula encompassed the cone rich fovea, which is used to focus on objects, the fovea degenerates as well. This occurence inables individuals to interpret the sensations they experience. Reading, ...
The retina contains rods and cones which detect the intensity and frequency of incoming light and, in turn, send nerve impulses to the brain.
Blindsight is often understood as supporting certain claims concerning the function and the status of the phenomenal qualities of visual perceptions. In this talk I am going to present a short argument to show that blindsight could not be understood as evidence for these claims. The reason is that blindsight cannot be adequately described as a special case of seeing. Consequently, it is not possible to draw inferences from it concerning the role of the phenomenal qualities for seeing.
The three primary colors - as far as light is concerned - are red, green, and blue. In order to "see" images, the human eye enables light to stimulate the retina (a neuro-membrane lining the inside of the back of the eye). The retina is made up of what are called rods and cones. The rods, located in the peripheral retina, give u...
And the retina. These are all on the wall of the eyeball, the fibrous tunic consist of
...2007).Evolution of the vertebrate eye: opsins, photoreceptors, retina and eye cup. Nat. Rev. Neurosci. 8: 960–976.
Color Vision Development in Infants: The Responsibility of Cone Types and Wavelength in Order of Color Development
Light is what lets you experience colour. The pigment of the retina in your eyes is sensitive to different lengths of light waves which allows you to see different colours. The wavelengths of light that humans can see are called the visible colour spectrum.
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