Well, the opticians do tests on your eyes first to figure out exactly what sort of lenses you need to let you see as clearly as possible. They send the results of these tests away and they get your perfect lenses sent back to them. After that it is just a case of attaching the lenses to the frames of the spectacles, usually either by glue of some sort or by clamping two pieces of the frame around the glass part using little screws.
Comments