Allow your eyes to focus on a point and breathe in and out slowly

You’ll get your whole mind to focus on something specific and the outside world will fade

Used to do this to my shooting glasses, just put Scotch tape on my non-dominant eye so I could leave it open while shooting open sights.

I’m “wrong eyed” so my brain always tried to look down my gun with my left eye. The tape solved it. With practice I can now shoot well with regular glasses, though it’s still more comfortable to use taped glasses.

Don’t listen to the wrong prescription talk as it will hurt your eyes. Tape is cheap and safe.

You mentioned open eye meditation… My mind jumps to kaleidoscopes at the mention of that.

You could buy cheap plastic ones and scuff them up with high grit sandpaper, diffusing the Lenses.

A pair of off-the-shelf reading glasses will make everything other than what’s right in front of your face blurry. But please don’t use them to blur distant things you actually will be looking at for long stretches. Your eyes will still try to focus on those blurry distant objects, and that will cause ocular muscle strain. If you did it for a few years, you could cause permanent changes to the shape of your eyeball. Then you will really need glasses.