There are two different types of ski goggle lenses: cylindrical or spherical. Beyond this, there are a number of different features available, depending on your requirements. Polarized lenses are better at cutting out glare than a standard mirrored lens, for example. While ski goggles are designed to prevent fogging, some goggles will have a more resilient anti-fog coating than others. If you’re someone who skis in snow or shine, you might consider buying a frame that allows you to interchange your lenses. That way, you can wear lowlights on foggy days when visibility is low, and polarized lenses during a clear sky day to keep the sun out of your eyes.