'Are There Blind Spots in Our Eyes?\r'

'Are in that respect Blind tactual sensation in Our middlefields? ABSTRACT Our nerveball be vital organs because they help us enter our surroundings. But atomic number 18 our centerfields perfect in seeing what’s proper in battlefront of us? Sadly I learned in our evolution, nature messed up at iodine insinuate and gave us artifice names in our centres. This project shows wherefore we agree these trick drifter, how to discover them, and how broad they ar. I enquiryed on how our malls see things; why when greenbackinal spunk is closed, the former(a) centre of attention some whiles can’t see what’s in front of it. I excessively found during my research a economy that is used to estimate the sizing of a gentle eye’s ruse spot.I performed an experiment using Blind Spot foot race broadsheet I made to verify the public of finesse spots in my eyes. I alike collected data while canvassing to follow the surface of my scr eenland spot. I learned the sizing of eyes’ blind spots varies in congeneric to the size of the homosexual eyes. QUESTION Are thither any blind spots in our eyes? If there ar, how do we catch out them, and how big are they? VARIABLES Dependent Variable: Size of the blind spot in our eye Independent Variable: diam of the eye Experimental root Controlled Variables For Each Group Child Test yield MeAdult Test Subject My Mom HYPOTHESIS If I close one of my eyes, using a shew razz pronounced with different symbols then I can find my other eye’s blind spot. put up a ruler/yard set out to enlist measurements; I can estimate the size of that blind spot too. I think the large the human beings eye, the bigger the blind spot is. BACKGROUND question The following diagram shows the anatomy of a human eye (New comment of Laruelle’s ‘Biography of the Eye’). Our eyes see things when hoy reflects off the objects goes through with(predicate) the pup il and sends the information to our brainpowerpowers.The eye and brain get together as a group that after the information gets delivered to the brain as electro-chemical signal, it is interpreted, or â€Å"seen”, as images (WebMD). The first layer of our eye is the cornea. It is made of a clear tissue and protects the eye comparable a see through glass cover. More importantly, it helps the eye focus on an object while swallow passes through it. The iris, a colorful part of the eye around the pupil behind the cornea contracts or dilates to carry the amount of fall that goes into the pupil. The pupil at the center of the iris is an opening that lets the clear(p) into the eye (Your Eyes).After light enters the pupil, it passes through the lens behind. The lens functions just like a camera lens so that it focuses the light and beams it onto the retina, the light receptor at the patronise of the eye. The retina’s surface is flat and smooth, and it acts like a pic screen or the film of a 35mm camera. However, conflicting a screen or a film, the retina in any case has some other features, one of which is the light sensors that get word light. After the retina detects light, it permutes the light into electro-chemical signals. These signals then exit the back of the eye via optical nerves and get direct to the brain for processing (WebMD).There is a little bailiwick on the retina where the optical nerves are abandoned to the eyeball at one end and connects to the brain on the other end. This spot of the retina contains no light sensors. Without light sensors the retina cannot sense light, therefore if light hits that spot, it cannot convert the light into electro-chemical signal and pass the information to the brain to â€Å"see”. This forms a blind spot on the eye. The blind spot however, doesn’t affect our muckle because our brain â€Å"ignores” it. Also having a pair of eyes, one eye can back up the other eyeâ₠¬â„¢s blind spot so that we have a clear vision to the highest degree of the time.This is why people usually don’t notice the effects of blind spots (Kingfisher 114). There are ways to quiz human eye’s blind spot. Scientists also discovered formula to estimate the size of our blind spots. Depending on the size of our eyes, we each have unique blind spots. substantial LIST A cardboard card rough 3 x 5 in (or 8 x 10 cm) in dimension subdued Marker to draw symbols on the cardboard card Ruler/Yard Stick A draw to record the data EXPERIMENTAL PROCEDURE a good deal people use the following experiment (Exploratorium), or its variation to examination for blind spots exist in our eyes:Make a test card using the cardboard material. Use a contraband marker pen to draw a black cluster and a mishandle on the deuce edges of the card. Make sure the dot and the brush are on the same level. Hold the test card away at an arm’s length and at eye level, while the other hand holds a yardstick just to a lower place the left eye. Put the test card on top of the meter stick. Make sure the cross on the test card is on the right hand side. Close your right eye and discern at the cross with your left eye. At this point, you should also be able to see the black dot. decoct on the cross and move the test card towards you by sliding it along the yardstick slowly.At a certain point, the black dot will vanish from your vision. Record the measurement on the meter stick when that happens. Continue to move the test card beforehand; you’ll notice the black dot will re-emerge again. You can also test for the other eye by closing your left eye instead. This time you should look directly at the black dot with your right eye, and as you move the test card closer to you, you should notice the cross disappear and appear again. DATA AND DISCUSSION The following is the formula for finding the size of the blind spot of a human eye: S/m = d/ tumultuousness this equation, S is the size of the blind spot on the eye, m is the distance of pupil to retina, estimated by the diameter of the eye, d is the size of the black dot on the test card, and D is the distance from eye to the test card (Exploratorium). 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 preceding(prenominal) experimental procedure, and wrote down the data.Experimental Data Black venereal infection SizeDistance between eye to test card when black dot disappeared Andy Eye diameter = 2 cm0. 25 in ~= 0. 635 cm11. 75 in ~= 29. 845 cm Andy’s Mom Eye diameter = 2. 5 cm 0. 25 in ~= 0. 635 cm13 in ~= 33. 02 cm found 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 rough ly 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 assay the experiment. CONCLUSION In conclusion there are blind spots in the eyes and my speculation was even off. 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 vision field. With that being said we are at the end of my research paper. I confide you enjoyed our little adventure. ACKNOWLEDGMENTI would like to thank my mom, Jane, for being my test subject for my experiment. WORK CITED 1. â€Å"Blind Spot: To see, or not to see”, Exploratorium, http://www. exploratorium. ed u/snacks/blind_spot/index. hypertext mark-up language 2. â€Å"New Translation of Laruelle’s Biography of the Eye”, Fractal Ontology, Nov 21, 2009 http://fractalontology. wordpress. com/2009/11/21/new-translation-of-laruelles-biography-of-the-eye 3. â€Å"The Kingfisher Science Encyclopedia”, Kingfisher Publications, 2006 4. â€Å"Your Eyes”, Kids Health, http://kidshealth. org/kid/htbw/eyes. html 5. â€Å"Your Guide to How the Eye Sees”, WebMD, http://www. webmd. com/eye-health/amazing-human-eye\r\n'