Lens shades vary greatly, but should not be strong enough to cause color distortion. Green and gray lenses are called “neutral” colors, while brown lenses increase contrast. You might want turquoise lenses if you work (or play) in high to medium light conditions. Darker turquoise lenses also enhance contrast without producing color distortion. Yellowish sunglasses lenses are popular among pilots, boating enthusiasts, hunters, and skiers since yellow optimizes object definition.
If you want trendy sunglasses for men, go for purplish or dark blue lenses that partially conceal your eyes without obscuring your vision. Mild tints are recommended for men who work on the computer all day long because these tints increase contrast and reduce eyestrain. Finally, mirrored coatings have made a comeback in recent years, which deflect light but do not allow transmission of light through the lens. Men's sunglasses with mirrored coatings do not heat up in sunlight and stop the scattering of UV rays within the lens.