UVC Rays
 
The impact of UVC rays is controlled by the ozone layer where these rays are absorbed. The small amounts of these rays that succeed in passing through the ozone layer are largely absorbed in the epidermis of the skin and do not penetrate to the dermis. Therefore, at this time, the effect of UVC rays is considered relatively inconsequential.
 

Despite the potential damage the sun's rays can cause, ultraviolet light is a double edged sword. Various wavelengths of ultraviolet light, in conjunction with medication, are effective in the treatment of acne, eczema, psoriasis, and other less common skin disorders. As with any potent treatment, the therapeutic use of ultraviolet light must be monitored carefully by a dermatologist in order to obtain maximum benefit with minimum risk.

One of the reasons for the concern over the gradual wearing away of the ozone layer, however, is that this wavelength of ultraviolet light could be very damaging to our overall health if received in larger doses. Perhaps this is one reason why the incidence of mole cancer has doubled in the last decade in North America.