Sunglasses with a gradient lens have a tint that changes from top to bottom. The darkest part of the tint is usually at the top, and the lightest part at the bottom. Sometimes the bottom part of the lens has no tint at all. Double gradient lenses are a subset of gradient lenses. These have dark tints on the top and bottom and a lighter area in the centre. This range expands into triple-gradient options. These transition not only in darkness but in colour. Gradient lenses are a wise alternative to polarised lenses. Polarised lenses are best in situations where you encounter a lot of glare, like being at the beach. Gradient lenses are ideal for activities like driving. They are great in situations with a lot of sunlight overhead. Gradient lenses block out overhead sun while allowing you to see through the light part of the lens. Double gradient lenses can also be handy if you find polarised sunglasses too dark. They protect your vision from bright sun and reflective ground surfaces. At the same time, you can maintain a clear, less-adjusted vision through the centre of the lens.