I discovered a problem with vision that can be fixed with a pair of scissors.
One day, I was reading a book on my Kindle, unhappy with my tired old eyes. All of a sudden, the text got a lot clearer.
What happened? I'd raised my eyebrows!
When we get older the skin above our eyelids sags, and our eyebrows get bushier (think Andy Rooney). I realized that my eyebrows were between my pupil and the text. They are close enough to the eye that I hadn't realized they are degrading the image. Also, when I had trouble reading, I'd squint, and the problem would get worse.
So, trimming my eyebrows has improved my vision.
I think this eyebrow sag runs in my family. I've also heard that you can have an operation done that can fix it.
Note the glasses in that picture (my first mirror selfie). They're from Zenni Optical, $6.95 + 4.95 shipping. They are my reading glasses prescription, but I've recently found they work well for my computer (17" laptop). Having a larger lens area to look through (that is, not bifocal) seems to help, perhaps because it's easier to avoid a smudge or dust on the lens that you haven't gotten around to cleaning.
Finally, I've found it's easy to hold my table too close when reading or watching videos. That tires my eyes out.