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free plans: how to make a Blind Spot Display |
| Basic Description | This project exploits a fascinating phenomenon of our vision: the blind spot. There is a spot in each eye that lacks the ability to function like the rest of the eye - it cannot supply visual data to your brain. Under normal circumstances, the information collected by the other eye fills in the missing area, but under the proper conditions, the blind spot becomes apparent. Making the simple display with glow-in-the-dark paint and positioning it near a bed allows for a surprisingly fun activity while falling asleep. Read on for more information and the simple plan. |
To best understand the blind spot, let's start with an example. Make sure that your computer's cursor is at the edge of the screen to ensure that it doesn't interfere. Position yourself right in front of the two dots below; cover your left eye and look at the triangle. Move closer and further from the monitor and at one point the black square should completely disappear. Note that if you stop looking at the triangle the square comes back into vision. You can also close your right eye and look at the square - the same effect should occur. |
When you have both eyes open, the data from one fills in the missing data created by the other blind spot. Therefore, under normal conditions our blind spots are not apparent. When you close one eye and look around, the blind spot is also elusive; our brains fill in the missing data. If you look at a white wall with one eye, the brain assumes that the data missing from the blind spot is also white. Similarly, if you look at a black wall with one eye, the brain fills in the missing area with black. It is only when you look at a lone dot (or similar irregularity) that our brains cannot trick us into thinking that we have a full field of vision. |
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