Apparently 14 million Americans [http://www.nih.gov/news/pr/may2006/nei-09.htm] are visually impaired. That's a lot of people that need glasses.
Incidentally, I think the word 'nerd' needs to be revisited in terms of relevance in the information age. Bill Gates, Steve Jobs, the guy who co-developed the USB standard [http://www.youtube.com/watch?v=kEDmvTH3MWg], they were all "nerds", and they kick ass.
Do kids still call each other "nerds" as an insult? It's been so long since I've been in school. "You! You're different than me and all of my friends! DIFFERENT!!! [points finger, makes Body Snatchers scream]