It is a good idea. An option for people who don’t want to wear contact lenses on their eyeball but don’t like the frames of eyeglasses on their face either. Still, I feel squicked at the idea of having my face (other than ear lobes) pierced. So, as good as it could be for some people… I won’t be trading in my eyeglasses, with frames.
Image source: Never Lose Your Focus – All About Colored Contacts (original link is now gone)