i wore -4 diopter and i'm six months in 'no glasses' experiment after reading 'getting stronger' blog on eyes homeostatis. Here's what i found: - i can read books without glasses at all. i used to wear my -4 for anything. no more. - for laptop, i can use reduced (-2) and texts come sharp. i opt for no glasses and increase the text font size instead. - for driving , daylight gives sharper vision (it's like wearing a -2, with no glasses). it's a bit blurry for driving, but i don't need eagle-sharp clarity, i just need to avoid collisions.
so instead of donating your old glasses, you can use them to train your eyes, say for example: no glasses for books, -1 for tvs, -2 for laptop, -3 for driving, etc
i chose cold turkey because i often forget where i put my glasses and it's frustrating.
there is a plus lens therapy which i don't practice much because i keep losing my plus glasses.