Well John with the weather we have up here I decided to buy 2 different shades of Zurich's and I love them I can see my plane real good and with the UV protection your eyes don't take a beating. I use Grey tint for clear weather and Rose for overcast weather. I also have regular glasses they have to fit over and they tell what size limits there are for fitting. I took them to Sears and tried on different frames for fit and just got a basic prescription and use those for when I'm flying. It's worked really good and I love those Zurich's and feel the price is well worth it, especially when they protect your eyes so well.