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by yznovyak 2880 days ago
Adult human eye is surprisingly uniform in size. The vast majority of adults will be fine with contacts that have BC=8.5 +/- 0.1 and DIA=14.0 +/- 0.2. Many contact lenses are made in exactly one size combination only and everyone seems to be fine with that.

> buying them in gas stations, you're risking a lot.

How? That vending machine sells exactly the same Acuvue lenses that you can buy in US.