Mine are the same as Yah-E's: 2.5x TTL from SurgiTel (
www.surgitel.com)
They were $645 with $10 shipping, because they gave our school a group discount, which most of the optics companies are willing to do. We've had different companies come in and give demos - sometimes they'll even come on a lab day so you can try them out "in action." Some people claim they're not useful, but as someone who wears really strong glasses (lol - meaning i have vision issues anyway) i think they're SO HELPFUL for seeing detail (note: they only make things bigger, and don't take the place of your glasses/contacts unless you get prescription safety glasses behind them)
In addition to improving the amount of detail you see, they also increase your workign distance SO you're not craning your neck as much (ouch!)... as least once you figure out the whole indirect vision and chair position thing.
I think $655 is not too much to pay in order to avoid becoming a blind, disabled (think chronic neck/back pain) dentist at 40 =)
Besides, once you're in the clinic, your patients will obviously think you're a pro b/c you've got the super cool technical looking glasses
If you call or email the optics companies, i'm sure they'll be more than helpful, and would probably come to your school to do a demo. Else, hand the project off to your student government and emphasize "group discount"
