Pinhole Glasses

I found a pair of pinhole glasses and when I put them I could see clearly through my normal vision. I checked the internet and he says these things can help improve eyesight. But when I take them off my back to the way I have. How do I use these holes to improve the view? I am a little shortsighted, but do not wear glasses.

I have a pair of pinhole glasses and I wear them when I watch TV or read under bright light. They work for people who are close to.
One way to tell if they can work for you is to create three holes close together on a piece of cardboard and stand back at a distance and watch TV through the pinholescand see if your vision seems improved.
You should be able to see immediately if it will work for you.