Young Black Haired Girl With Sunglasses Reveals Her Blue Bikini At The Swimming Pool

• Orange and yellow lenses increase both contrast and depth perception. They also increase color distortion. Yellow lenses are used by pilots, boaters, fishers, shooters, and hunters for their contrast enhancement and width perception properties.
• Blue or purple lenses are mainly cosmetic.
With the introduction of office computing, ergonomists may recommend mildly tinted glasses for use by display operators, in order to increase contrast.
Clear lenses are typically used to protect the eyes from impact, debris, dust, or chemicals. Some sunglasses with interchangeable lens have wet lenses to protect the eyes during low light or early morning activities.