Why can't a prescription for glasses be used for contacts also? Isn't the eyesight still the same?
At first, I cynically thought it was just another way for my optometrist to make money -- so he had to charge me for another test. But then I thought about it... and I understand that the contacts need to fit to your eyes and such, so they need to know how bulgy or small your eyes are, etc -- but does the overall eyesight prescription stay the same?
Or is the reason, as I have theorized for the second prescription for contacts, they are testing the size of your eyes and getting measurements?