14g Ultra Light - ATTCL Blue Light Blocking Glasses,You can hardly feel them on your face, making your work easier! NO MORE TIRED EYES - Reduce eye strain, eye fatigue and sensitivity to light during long computer sessions. Allow your eyes to blink and function naturally. Great for office workers or anyone who has to look at a screen all day. Designed for all day comfort with a durable yet flexible frame. Whether youâ€re catching up on emails after a long day at work, or burning the midnight oil to finish a project - protect your eyes from excessive levels of blue light BLUE LIGHT BLOCKING LENS can effectively block ultraviolet radiation ,provide 100% UV400 protection and filter harmful blue light,it is suitable for use when watching TV and look at computer.