Glare Under Bright Sunlight

Outdoor light (sunlight) is very glaring.

Every time I go outside, I feel eye pain from the bright sunlight! Why not choose the right lenses for yourself?

Sunlight Shining Down on Earth

Light from the sun shining down on Earth includes UVB and UVC rays, visible light, and infrared rays, and it is the "visible light" that makes people feel glare. However, ultraviolet rays in the summer are particularly strong and become a factor causing eye diseases. Therefore, protecting the eyes from ultraviolet rays is very important.

"Visible light" that people feel is glare, and "ultraviolet rays" are invisible

Sometimes we hear customers say they want to cut out ultraviolet rays as a measure against glare, but in reality, this is not correct. Visible light means light with wavelengths from 380 to 780 nm that the eye can see as shown in the picture. Glare is caused by this visible light, not by ultraviolet rays. Ultraviolet rays actually cause damage, such as sunburn, age spots, and freckles, and for this reason, people tend to think that ultraviolet rays also contribute to glare.

What is the glare of "visible light"?

Among visible light, blue light has a short wavelength, is easily scattered, and causes glare. For those sensitive to glare, scattered blue light is very dangerous because it makes the scenery look bright and thus reduces vision. Additionally, glare can cause eye strain.

Measures against "ultraviolet rays" and "blue light" need to be taken along with anti-glare measures

In outdoor places, short-wavelength rays, such as ultraviolet rays in sunlight, have strong energy and there is concern that they cause stress to the eyes. For this reason, it is important to pay attention to protecting the eyes from ultraviolet rays and the "violet light" of particularly short wavelengths of blue light at the same time. Even some clear lenses can cut out most ultraviolet rays and are effective against these rays.

Measures / Improvements

• To combat glare outdoors, choose lenses that suit your lifestyle or circumstances.
• Glare varies from person to person, and selecting colors or depths that match the level of glare will be effective.
• Especially when wearing dark lenses, the pupils will dilate and ultraviolet rays can easily enter the eyes. Therefore, combine the use of these lenses with a coating that can block ultraviolet rays reflected on the back of the lenses and enter the eyes.
• When buying sunglasses available on the market, choose those with the label "UV400" displayed on them.