Great to see all these glasses alternatives. You can buy a few cheapo pairs at varying magnifications. If you lose them, you don't lose sleep. For serious work, you cannot go past a Vision Mantis, proudly designed in the USA, proudly made by in the UK, and the design is so good it has never been able to be copied by Hoo Flung Dung Enterprises. No glasses needed unless your eyes' focal lengths are unbalanced.
Shop around for your nearest electronics company that is going bust and see if you can score a Vision Mantis. Even at a grand, they are worth every cent.