Buying varifocal glasses online isn't quite as easy as buying ordinary single vision glasses. Why?

Because you are getting 2 lenses in one, it's important that the positioning of each lenses is correct. If it isn't you won't be able to see properly and it will be an expensive mistake. It's important then that you choose an option with everything you need to make a good choice of varifocals.

Make sure that the optician is getting a measurement of the settings required for your varifocal lenses. They can do this either by you sending them your existing glasses (providing of course you are happy with them) or by asking your local optician to provide the extra information needed on your prescription. The extra information you will need is optical centres and heights.