http://www.greatcontactlens.net/contact-lenses-air-optix-aqua/
I've mixed up my air optix aqua contact lenses, which lens is for which eye?
I mixed my air optix aqua 8.6 monthly contact lenses up. I use -1.50 for my right eye and -1.75, on the contact lens rim it says x647 and on the other x648, which lens is for which eye?
not much difference in the prescription but you should be able to tell. Put them in and cover one eye at a time, see what things look like. Then clean them,switch them round and do the old 'better or worse' test.