If you sat in the back of the class and needed glasses you were probably always squinting. Even though it probably isn’t good for you it did work. But why does it work exactly?
The reason is that the lens on the front of your eye is constantly changing shape in order to focus on objects that are near or far away. When you squint it lets you eye reshape even more bringing everything into focus.
If you are always squinting you probably need to get your eyes checked, but that’s why it works.
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