Test Your Peripheral Vision Essay

1021 words - 5 pages

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. ...view middle of the document...

So here are some of the following questions that will be responded to:
1. How many rod and cone cells are there in the average human eye?
2. Why does it usually seem that our surroundings are clear and in focus, when in reality, only a small region of our visual field is in focus?
3. What types of cells are responsible for peripheral vision, and how are they distributed in the retina?
4. Why does an object need to come close to the center of your vision before you see its color and shape? (Hint: What part of your retina is receiving light from an object as it moves across your field of vision?)

How many rod and cone cells are there in the human eye?

The rods in people’s eyes have more than 120 million; rods are much more numerous than cone cells. Rod cells are also much more sensitive than the cones. There are only about 6 to 7 million cone cells in the average human eye. Those 6 to 7 million are more concentrated on the central yellow spot of the eye, also known as the “macula.”

Why does it usually seem that our surroundings are clear and in focus, when in reality, only a small region of our visual field is in focus?
It normally seems that our surroundings are clear and in focus, but in reality, only a small region of our visual field is in focus that would be because you are only using your central vision, focusing on one specific object. You weren’t using your peripheral vision. Your eyes are always in peripheral vision; you just don’t notice it, you don’t really pay attention. When you aren’t focusing on something important just actually think about peripheral vision and you will notice that you can see on both sides of your head without moving your eyes. Also you can see everything going around you, this is very good to have while driving, so you are very aware of your...

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