I'll check out the prices and options on the 1.67 photochromic lenses there. Looking at Zenni Optical's website (the cheapest I have found for regular lenses / frames - and you can read my review of Zenni here) it says that their 1.67 index lenses start at $34.95 and the photochromic lenses are $27.
Legitimate Power. Legitimate power is also known as positional power. It's derived from the position a person holds in an organization's hierarchy. Job descriptions, for example, require junior workers to report to managers and give managers the power to assign duties to their juniors.
(September 2011) In politics, a mandate is the authority granted by a constituency to act as its representative. The concept of a government having a legitimate mandate to govern via the fair winning of a democratic election is a central idea of representative democracy. New governments who attempt to introduce policies that they did not make public during an election campaign are said not to have a legitimate mandate to implement such policies.