Essay Are There Blind Spots in Our Eyes?

Words: 1458
Pages: 6

Are There Blind Spots in Our Eyes?

Our eyes are vital organs because they help us visualize our surroundings. But are our eyes perfect in seeing what’s right in front of us? Sadly I learned in our evolution, nature messed up at one point and gave us blind spots in our eyes. This project shows why we have these blind spots, how to discover them, and how big they are. I researched on how our eyes see things; why when one eye is closed, the other eye sometimes can’t see what’s in front of it. I also found during my research a formula that is used to estimate the size of a human eye’s blind spot. I performed an experiment using Blind Spot Test card I made to verify the existence of blind spots in my eyes. I also collected data
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Thus, to solve for S, we have:
S = d/D * m

To perform the experiment, I have two test subjects: my mom and myself. We measured the diameter of each of our eyes as following: my eye is roughly 2 cm, and my mom’s eye is about 2.5 cm. Then we stepped through the above-mentioned experimental procedure, and wrote down the data.

Experimental Data Black Dot Size Distance between eye to test card when black dot disappeared
Eye diameter = 2 cm 0.25 in ~= 0.635 cm 11.75 in ~= 29.845 cm
Andy’s Mom Eye diameter = 2.5 cm 0.25 in ~= 0.635 cm 13 in ~= 33.02 cm

Based on the data collected, I calculated my blind spot is approximately 0.0426 cm, or 4.26 mm in diameter; and my mom’s blind spot is roughly 0.048 cm, or 4.8 mm in diameter. Since her eye is slightly larger than mine, her blind spot is a tiny bit bigger than mine as well. I wish I were able to find more test subjects for my experiment. However, I couldn’t find other people to try the experiment.

In conclusion there are blind spots in the eyes and my hypothesis was correct. The experiment shows there is a blind spot in the corner of our eye because of the optic nerve, and that the size of the blind spot differs from person to person. Our blind spots are an evolutionary defect. Nature was able to correct it by making us have two eyes so we could see clearer and we have a bigger