Main Functions Of Peripheral Vision Essay

810 Words May 10th, 2016 4 Pages
The task suggested that I needed a friend or an explainer (someone who works at the museum) to help me with the exhibit. Then I had to push my cheeks against the board and stare at the spring. I then had my friend hold a triangular block at one hundred degrees and slowly move it around the edge of the circle toward the spring. I had to really focus on the spring and not to cheat by looking at the block because then the whole point of the exhibit wouldn’t work. As I pay close attention, I noticed when I first catch sight of the block out of the corner of my eye. I noticed the movement of the block before I can see any detail or color. First I perceived motion, then color, then the word. The question is why and how does this happen? The main functions of peripheral vision are recognition of well-known structures and forms with no need to focus by the fovea line of sight, identification of similar forms and movements and delivery of sensations that form the background of detailed visual perception. Peripheral vision is the work of the rods, nerve cells located largely outside the macula, the center, of the retina. The rods are also responsible for night vision and low-light vision but are insensitive to color, as opposed to central vision. Peripheral vision is weaker in humans, compared with other animals, 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. I see the…

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