The sun emits three kind of ultraviolet radiations, depending of their wavelengths: UVA, UVB and UVC.
These radiations are invisible to the human eye but can have disastrous effects on the human body. UVA represents 95% of UV radiation on earth’s surface and induces sun tanning but also skin aging and can cause eye damages, especially in children. UVB only reaches the epidermis of the skin and causes sunburns, blistering, skin cancers and eye damages. UVC are the more harmful radiation but are filtered by the ozone layer.
The effects of UV rays are more damaging in summer than winter. However, be careful with cloudy weather at any time of the year. Contrary to the popular belief, UV rays can penetrate clouds. It is recommended to wear eye protection all year long.
Moreover, make sure that children have a good eye protection, especially if they are under ten. They are particularly exposed to severe eye damage as their eyes are not able to filter the sun’s UV rays.
The superior performance of Nikon lenses is aided by Nikon’s UV cut 400 process, which blocks harmful UV light. All Nikon single vision lenses, except 1.50 cut 100% of UVA, UVB & UVC.