The person telling you it's illegal to buy online is the same one that stands to loose a source of income with a nice profit margin. Depending on where you are, it's illegal for the doctor to deny you a copy of your prescription.
I used to work for Vision Direct (5 years ago) and you get the exact same lenses as from the doctor. Yes, you should always make sure you are tested for an exact lens before using them. But don't let the Doctor try and force you into buying theirs. They are doing their best to discredit online sources, but there are reputable sellers such as Vision Direct (lensmart, lensquest), 1800 Contacts, Coastal Contacts, etc.
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