For many recreational skiers, a pair of goggles are almost an afterthought, bought at the last minute because they looked good or fit right. While fit and aesthetics are important, goggles also have different types of lenses, and many goggles actually have interchangeable lenses, so that you can switch to a more appropriate type of lens for the lighting your are skiing in without having to buy another pair of goggles.
Dark tints, like a citrus gold, green or even black base, are ideal for bluebird days when the light is exceptionally bright and intense. Many of these lenses are also polarized to cut glare, which can be especially intense when skiing at resorts in the Rocky Mountains at higher elevations.
Clear lenses have no tint or polarization, and should only be used for night skiing.
Low-light lenses are typically yellow, gold or light amber. These lenses bring out more contrast in the slopes by filtering out some of the blue light. True flat light lenses, which are designed for stormy days when the gray and overcast lighting can sometimes make it hard to tell which way is up or down above the treeline, use a rose tint.
Photochromatic lenses, sometimes called universal lenses, are actually designed to change from dark to light, depending on the light conditions, so that you don't have to swap goggles or lenses. Most of these lenses are also polarized to cut glare.