The Clark HD Night Driving Bifocal Safety Glasses have yellow lenses to block out blue light while driving in rain, fog and hazy weather. HD Night Driving Eyeglasses improve color, clarity and optical definition allowing you to have excellent night vision. The special anti-glare lenses reduce eye strain and glare from headlights, street lights and traffic lights during wet and dark conditions. Each lens includes a small section of magnification on the interior side in the power of your choice. Can be worn by men and women. These unisex, ultra lightweight, stylish and trendy half rim wrap around sport night time sun readers have a shatter proof polycarbonate design that meets ANSI z87.1 safety glass requirements for eye protection. Rubberized nose and temple pieces ensure a comfortable fit. Can be worn while driving during the day or night, in your car, on your motorcycle, golfing, fishing, and all outdoor sports and activities.