UV-A (315～380nm Wavelength)
The UV-rays that effect the skin when exposed. The rays reaches the true skin and causes wrinkles and sagging.

UV-B(280～315nm Wavelength)
The UV-rays that effect the surface of the skin and within few hours makes the skin red. The rays accelerate the production of melanin.

The Melanin is said to become the cause of unwanted spots and freckles.This Melanin pigment is produced in the skin not only due to direct exposure to the skin but also when the eyes are exposed to UV-rays.

In addition it is said that UV-rays cause deficienciessuch as, deficiency in the immune, cataract, and age related macular degeneration.

The near-infrared rays reach deeply into the skin and become the cause of wrinkles and sagging of the skin. In addition around 50% of rays in the sunlight is near-infrared rays where as UV is 10%.

It is important to of course wear hats and use sunshades to protect ourselves from UV-rays, but we also need to consider using sunglasses and eye wear to protect the eyes from near-infrared rays.

Photo aging which is one of the cause of the aging of the skin, and is caused not only by the UV but also the near-infrared rays.　The　near-infrared rays causes wrinkles and sagging of the skin to make the skin look old.

The ratio of near-infrared rays contained within the sunlight is 50% whereas the 10% are UV-rays and 40% are visible rays. Also we now understand that the near-infrared rays reaches deeper than the UV-rays into the skin,down to the true skin and more over to the muscles.

The eye expression is a place where we need to be careful at, due to that it is a place where wrinkles and sagging of the skin can be found in many cases. The eye expression is a place where it is hard to protect with a sunscreen.