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I recently received a text from an out-of-state relative, asking if he should have his college-age daughter put in progressive lenses to help delay progression of her nearsightedness.

I told them that there wasn’t good evidence that doing that would help, and since progressive lenses generally cost about three times as much as single-vision lenses that he shouldn’t do it.

The optometrist they were seeing at the time insisted I was wrong and strongly encouraged them to do it. Included...

1. Vision is so important to humans that almost half of your brain’s capacity is dedicated to visual perception.

2. The most active muscles in your body are the muscles that move your eyes.

3. The surface tissue of your cornea (the epithelium) is one of the quickest-healing tissues in your body. The entire corneal surface can turn over every 7 days.

4. Your eyes can get sunburned. It is called photokeratitis and it can make the corneal epithelium slough off just like your skin peels...