• CONTROL BLUE LIGHT EXPOSURE: Crystal Day Swannies come with modern translucent frames and provide the perfect balance of protection against the most harmful spectrum of blue light (400-450nm), while letting in some of the healthy blue light (450-500nm), which helps regular circadian rhythm and improves alertness and memory function.
  • ELIMINATE SYMPTOMS OF DIGITAL EYE STRAIN: Made to be worn all day, everyday, Crystal Day Swannies can help eliminate symptoms of digital eye strain such as dry, sore eyes, irritation and headaches, whenever using a computer, tablet or phone.
  • ADJUSTABLE FRAMES: The cellulose acetate frames can be heated up and molded for the perfect custom fit or adjusted if bent out of shape, and the spring hinges provide a wide range of movement for extra comfort and durability.
  • HIGH QUALITY LENSES: Our high quality, clear CR-39 lenses come with anti-reflective coatings to provide superior visual clarity while protecting your eyes against harmful blue light.
  • 100% SATISFACTION GUARANTEE: We provide a 100% satisfaction guarantee.
  • CONTROL BLUE LIGHT EXPOSURE: Crystal Day Swannies come with modern translucent frames and provide the perfect balance of protection against the most harmful spectrum of blue light (400-450nm), while letting in some of the healthy blue light (450-500nm), which helps regular circadian rhythm and improves alertness and memory function.
  • ELIMINATE SYMPTOMS OF DIGITAL EYE STRAIN: Made to be worn all day, everyday, Crystal Day Swannies can help eliminate symptoms of digital eye strain such as dry, sore eyes, irritation and headaches, whenever using a computer, tablet or phone.
  • ADJUSTABLE FRAMES: The cellulose acetate frames can be heated up and molded for the perfect custom fit or adjusted if bent out of shape, and the spring hinges provide a wide range of movement for extra comfort and durability.
  • HIGH QUALITY LENSES: Our high quality, clear CR-39 lenses come with anti-reflective coatings to provide superior visual clarity while protecting your eyes against harmful blue light.
  • 100% SATISFACTION GUARANTEE: We provide a 100% satisfaction guarantee.