I wear 3X reading glasses for up close work.; that's the highest magnification I've found at stores.
Saw an advertisement on TV for readers.com, looked good, and they had huge magnification options, up to 7X!!!!
And a big discount for first time buyers, so I wanted to try some 5X.
Website looks good, it's a USA company, they take Paypal, good return policy, so I bought a 5X. My grand total shipped was $12.92 for a $14.95 pair of glasses. Shipping was prompt, very professional, they come wrapped in plastic (unlike the ones at the drug store with Aunt Betty's fingerprints on the lenses and greasy makeup on the bridges) with a professional invoice.
I love my new glasses! If you want more magnification and aren't afraid to spend a little more, I highly recommend it, 5 stars.
Occasionally, I'd put my geezer goggles over my 3X's but now I won't need to do that as much.
If I want to actually see the atoms spinning around in the metals I can use the 7X's and geezers together