I want to order glasses from an online store, but I'm worried I'll measure the distance between my pupils wrong or mess up entering my prescription data. Has anyone ordered this way before? How does it actually work?
Without a prescription from an ophthalmologist it's really risky - you need exact diopters, even a small mistake will give you headaches and eye strain. The distance between your pupils matters too, but that's less critical. If you have old glasses that work well for you, you can ask at an optical shop to take all the parameters off them for free. But honestly it's still better to see a doctor, it's quick and cheap, and then you can order online - it's usually cheaper there.
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