BTW, one of the measurements you need is the PD (pupil to pupil distance). My mother-in-law's Rx did not have this info, so I called Coastal to find out how to measure it. Got a really nice CS agent who explained that you simply use a ruler to measure the distance between the center of each eye, resting the ruler on the bridge of the nose. She noted that you cannot do this yourself in the mirror (she tried several times and failed), that it is best done by someone else, and that the measurement should be taken at least three times; it must be accurate within 2mm. So, I took the measurement myself, and got 55, 55, & 56mm, and went with the last on the order. If this post is still alive when her glasses come in, I'll report back the degree of success.