Letter: How to avoid myopia

When I close one eye, my field of vision decreases by one-half and I lose depth perception. Opening my other eye corrects those defects. This exercise reminds me of the dictionary definition of myopia: “Not able to clearly see things far away … only thinking or caring about things happening now or that relate to a particular group rather than things that are in the future or that relate to many people.”My second eye literally provides another point of view. It is the principle