Soulmate Gem
Soulmate Gem
Photo: Barcelos_fotos
Since we have two eyes we have two optic nerves that eventually meet at the optic chiasm, centrally located near the pituitary gland. At this point, each nerve then splits again so that both halves of the brain receive information from each eye.
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Read More »Much of the human brain is arranged in a way that the right half of the brain controls the left half of the body and vice versa. For example, information about touch and pain coming from the right half of the body goes to the left hemisphere of the brain; and muscle movements of the left side of the body come from the brain's right hemisphere. But the eyes are an exception to this rule. Since we have two eyes we have two optic nerves that eventually meet at the optic chiasm, centrally located near the pituitary gland. At this point, each nerve then splits again so that both halves of the brain receive information from each eye. Sight is a complex function of the brain that extends from the front to the back of the head. To produce sight, the eyes capture information and send it through the optic nerve to be processed by the occipital lobe. Each eye sees a part of the outer world which is called its visual field. The total visual field is the sum of the right and left hemi-visual fields in each eye. Just like the visual field is divided into two hemi-fields, the retina, a layer of cells at the back of the eye, is divided in half. The most important fact is that the lens of the eye inverts the image that forms on the retina; therefore, objects seen to our left are sensed by the right half of our left eye. In other words, light coming from anywhere in the left half of the visual environment projects onto the two right half-retinas, and the information is sent to the right hemisphere. This arrangement means that when are looking at something, each of the two retinas are seeing the same thing, providing binocular 3D vision. A massive stroke in the left side of the brain leads to paralysis and lack of sensation in the right side of the face, right arm, and right leg. What is less commonly known is that such a stroke can also lead to blindness in the right half of the visual world-the right visual field-involving both eyes. Problems with sight, such as vision gaps, are also divided along these lines. A complete right homonymous hemianopia (neurologists call this half-blindness) actually dissects precisely the center of gaze. For instance, if you look at the word "was," focusing your gaze on the "a," you wouldn't see the "s" - and you would only see the left half of the "a." We can see from such tests that each eye sends information to both hemispheres, and conversely, that each hemisphere of the brain gets input from both eyes. So it is more accurate to say that each hemisphere of the brain is dealing with the opposite half of the environment, rather than with the opposite side of the body.
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Read More »The 1-800-Contacts survey did align with a lot of that research, though: When asked about what personality traits they associated with each eye color, blue eyes were considered "sexy" and associated with a love for "trying new things" while brown eyes were considered "trustworthy" and "kind."
1-800-Contacts recently conducted a survey of 1,000 people in order to figure out people's perceptions of eye color and what these different color preferences can reveal about us. One of the study's main findings was that gray eyes are both the rarest and the statistically most attractive eye color, with hazel and green following closely behind. Conversely, brown eyes are the most common color yet the least attractive to the survey's respondents. According to World Atlas, approximately 79% of the world's population has brown eyes, making it the most common eye color in the world. After brown comes the blue-eyed crowd, with 8% to 10% of the world having blue eyes, 5% having amber or hazel eyes, and 2% of the world having green eyes. Statistically speaking, the rarest eye colors are gray and red/violet, and this novelty could be the reason gray eyes ranked as the most popular color among survey participants. "It makes sense that the rarer colors tend to be more captivating," clinical psychologist Carla Marie Manly, Ph.D., explains in an interview with mbg. "Rooted in primitive survival mechanisms, the human mind—and the human eye—tends to notice that which is different and unique." According to Manly, this tendency came from the need to notice that which was "different" in the environment in order to ascertain if the novel item or experience was safe or unsafe. Throughout evolution, she says, we've retained this interest in that which is novel. And though in some cases that which is novel is considered a detriment in others—such as a different eye color—it can also be considered interesting or attractive.
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