These glasses look like something you might wear to a party, but they are actually a very serious paper tool. Because of the 1mm holes, it's possible to focus your eyes without lenses. Paper goods, such as paper cups or paper plates are useful goods, when there is an emergency. These paper glasses are made to help you ride out a crisis when your glasses are broken in a disaster or accident.
Joel Soelberg of Wild Wood Survival explains the science that makes this possible and how to build your own pair of emergency glasses using bark.
Pinhole goggles provide an endless depth of focus when the eyes are not correctly focusing by reducing the amount of excess scattered light rays to the retina. They are good for helping with refractive errors of the eye. A refractive error means that the shape of your eye does not bend light correctly resulting in a blurred vision.
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