Blue light which is naturally being produced by the sun is also generated by digital devices such as the smartphone screens,Flat screen Television, computer monitor screens, laptops .LED and florescent light bulbs also emit blue light.
Anti Blue light glasses may help to reduce the harmful effects of blue light such as headache,dry eyes,and eye strains due to watching the screens for a long period.
Anti blue light glasses can be used when watching television,using laptops, computers and smart phones.
It can also be used as sunglasses during outdoor activities. It's unisex.