I am leaving for a cruise to Mexico early tomorrow morning and my last pair of contact lens have a slight tear. I thought I had an extra set but I cannot find them anywhere. I've read that you do not need a prescription to purchase contact lens in Mexico. Has anyone every purchased contact lens from Mexico before? How easy was it? Do you just go into an Optical store and buy them over the counter? I am stopping in Cabo so if you know a specif place I can go that'd be great. I just need one pair to last me the trip, then I will get an eye exam when I get back. Thanks in advance!