tO rYan__ Peripheral vision... Keeping an eye on me

Thanks for making everything happier and easier. That's for you. Hope you understand it and enjoy with today's lesson. ( be careful with the vocabulary!! lol... Miércoles???)

Peripheral vision is a part of vision that occurs outside the very center of gaze. There is in actuality a very broad set of non-central points in the field of view that is included in the notion of peripheral vision. "Far peripheral" vision exists at the edges of the field of view, "mid-perpheral" vision exists in the middle of the field of view, and "near-peripheral", sometimes referred to as "paracentral" vision, exists adjacent to the center of gaze[citation needed].
Peripheral vision is weak in humans, especially at distinguishing color and shape. This is because the density of receptor cells on the retina is greatest at the center and lowest at the edges (see visual system for an explanation of these concepts). In addition, there are two types of receptor cells, rod cells and cone cells; rod cells are unable to distinguish color and are predominant at the periphery, while cone cells are concentrated mostly in the center of the retina (the macula).
Peripheral vision is good at detecting motion (a feature of rod cells), however, and is relatively strong at night or in the dark, when the lack of color cues and lighting makes cone cells far less useful. This makes it useful for avoiding predators, who tend to hunt at night and may attack suddenly from ambush.
Peripheral vision loss may occur due to a number of ocular or neurological diseases or disorders. Glaucoma, stroke, branch retinal vein occlusion, branch retinal artery occlusion, ischemic optic neuropathy, and transient migraine are some of the more common causes, whereas retinitis pigmentosa, choroideremia, gyrate atrophy, pituitary tumors, optic disc drusen, brain tumors and aneurysms, and tilted optic discs are uncommon or rare
Binocular vision is vision in which both eyes are used together. The word binocular comes from two Latin roots, bin for two, and oculus for eye. Having two eyes confers at least four advantages over having one. First, it gives a creature a spare eye in case one is damaged. Second, it gives a wider field of view. For example, a human has a horizontal field of view with one eye of about 150 degrees and with two eyes of about 180 degrees. Third, it gives binocular summation in which the ability to detect faint objects is enhanced. Fourth it can give stereopsis in which parallax provided by the two eyes' different positions on the head give precise depth perception. Such binocular vision is usually accompanied by singleness of vision or binocular fusion, in which a single image is seen despite each eye's having its own image of any object.
Other phenomena of binocular vision include utrocular discrimination, eye dominance, allelotropia, and binocular rivalry.

The two eyes provide slightly different views of the same scene. Information from the left visual field goes to the right side of the retina in both eyes. At the optic chiasm, half the nerve fibers form the left eye cross over to the right hemisphere and the rest stay uncrossed, so that all the information from the left visula filed ends up in the right hemisphere.
In this way, a given hemisphere gets information from the opposite half of the visual world, but each hemisphere gets input from both eyes.

Thanks for always keeping an eye on me, even when I dont have ADD. lol.

En Inglaterra también hay feos.... Atención al tipo de detrás.... RISAS SON!!!!!!!!!!!!!!