Sunglasses allow better vision in bright daylight, and may protect one's eyes against damage from high levels of ultraviolet light. Typical sunglasses are darkened for protection against bright light or glare; some specialized glasses are clear in dark or indoor conditions, but turn into sunglasses when in bright light. Most sunglasses do not have corrective power in the lenses; however, special prescription sunglasses can be ordered. Specialized glasses may be used for viewing specific visual information (such as stereoscopy) or 3D glasses for viewing three-dimensional movies. Sometimes glasses with no corrective power in the lenses are worn simply for aesthetic or fashion purposes. Even with glasses used for vision correction, a wide range of designs are available for fashion purposes, using plastic, wire, and other materials. Other good products for male libido Health-related evidence If you or maybe your partner is definitely an uncircumcised man, maximize sensitivity and increase sexual gratification having a foreskin retraction device. A foreskin retraction device can be a pleasure enhancing toy that retracts the foreskin to show the most sensitive areas, helping you to experience maximum pleasure during lovemaking.