As opposed to transition lenses, another option in colored lenses is a tint, which remains constant at all times. Tints are available on plastic as well as glass lenses and can be had in almost any color of the rainbow. Lighter, fashion tints are used primarily for cosmetic purposes to enhance a wearer's looks. Darker tints allow the wearer to use the lenses as sunglasses.
Typically, fashion tints are applied in light pink, brown or gray, while sunglasses are usually gray or brown. A tint can be solid, when the entire lens is the same color, or gradient, which is a gradual fade from dark to light, usually fading from the top down.
Other colors can be applied to lenses for different purposes:
Rose Tint: A rose tint is cosmetically appealing, soothing to the eyes, and seems to provide a degree of relief when the wearer is working in brightly lit offices. A rose tint if often recommended for computer use to help reduce eyestrain.
Yellow Tint: A yellow tint makes objects appear sharper. Yellow tints are sometimes marketed as "blue blockers". Yellow tints are good for overcast, hazy or foggy conditions and are a favorite among shooters, skiers, pilots and professional drivers.
Brown Tint: Brown and amber tints work well in variable light conditions and provide enhanced contrast and depth peception. Brown lenses are good general purpose lenses.
Green Tint: Green tints offer the highest contrast and greatest visual acuity of any tint.
Grey Tint: Grey tints are often referred to as "true color" tints. Grey tints do not distort color. They are a good choice for general purpose use. Grey is also an excellent choice for computer use, and is recommended for black and white screens.
Blue Tint: Lighter shades of blue are popular fashion tints. Blue is an excellent choice for computer use, and is recommended for amber screens.
Purple or Violet Tint: Purple is a balanced color, providing natural color detection while shading the eye. This is an excellent choice for computer use, and is recommended for use with green screens.