Hey Citygirl -- I have astigmatism, dry eye, etc
For contact lenses, despite 5+ years here, I still pick them up when back in Canada, in 6mos or 1year batches. It's kind of silly of me to do so. Because of my dry eyes I wear 1 day disposables (though sometimes wear a pair for 2 or 3 days cleaning in saline in between)
I wear Johnson&Johnson's 1-day Acuvue moist -- I think you can get these here, I love them, I've been wearing Acuvue for years. My contact lens woman back in Canada wants me to change to Acuvue TruEye but she sent me a sample and they don't sit properly on one eye, so until I go home again I'm going to stick with what I have. My opthamologist here said these lenses I'm on right now though are perfect so no need to change -- TruEye do breathe more than the Moist though.
I believe you'll need a local prescription to get lenses here. I went to the Dr Charles opthomology centre over near Facultad de la Medicina -- very good centre, they're with OSDE, probably with Swiss Med etc as well.
I've been wearing contact lenses for 22 years, I haven't owned a pair of glasses in about 12 years -- glasses were just so expensive and distorted so much that I never used them. However my opthamologist said I should start wearing them again, even if just for a couple of hours a day. I got a prescription in August and then never went ahead and got glasses made -- does anyone know if that prescription is still valid, or are they like other recetas here and "expire" after 30 days?