Here are two things you should know about progressive before panicking and thinking they're not for you, or the lenses have a problem, if it's your first pair:

• They will probably give you headaches and nausea the first few days. It's normal since the correction is totally alien to your brain. But bear with them until your noggin' finds its bearings with them - and also gets used to driving your neck muscles to clear your vision. If you can't get used to them after 4 weeks, then maybe there's something not quite right between you and the glasses.

• The far zone at the top is the widest: you get proper correction from left to right. The near zone at the bottom however is only a narrow zone, and the sizes are fuzzy. It's normal, and it's super-noticeable at first when you're not used to them. But eventually you'll subconsciously turn your head to keep the clear center zone in your field of view and the fuzzy sides will disappear.