I currently have 3 pairs of glasses........I used to work retail, so w/ the discount, I was able to get 3 pairs. I made sure the prescription was the same, and the PD was the same......

2 of them are drillmounts, and 1 of them is a plastic square frame with transitions. If I switch them back and forth, like I do clothings....do you think it will effect my vision in anyways? I mean, the lenses are the same rx, but the frame shape, size and all that are different....

I love glasses and love them as a fashion accessory, but if it is better for my eyes to stick with 1 pair, I would do that...