Obtaining the correct knowledge of eyeglasses and lenses, which you do not know unexpectedly, will help you to care for your own eyes and eyesight. Please use it as a reference for living a healthy and comfortable visual life.
Vol.8 Story about lens color
In the coming season when the sun is getting stronger, sunglasses will be used more and more as a means to protect the eyes from glare and ultraviolet rays. This time, we will show you the roles and effects of sunglasses by lens color.
1. What is visible light?
The light that we usually see is the part of the wavelength between about 380 nm (nanometers) and about 780 nm, which is called visible light.
Among them, you can see from purple to red, which are said to be the seven colors of the rainbow.
There are infrared rays outside red (long wavelength) and ultraviolet rays outside purple (short wavelength), and wavelengths other than visible light cannot be seen by the human eye. In particular, what you feel as glare is the wavelength corresponding to yellow in visible light.
Causes of glare include cataracts, corneal / iris disorders, and photosensitivity.
If you are having trouble with glare that people around you do not feel, it is a good idea to consult a specialist once.
2. Role and effect of lens color
A yellow lens makes the landscape look yellow, and a blue lens makes the landscape blue.
This is because the lens color allows the color of the lens itself and similar colors to pass through and cuts the opposite color (complementary color).
This effect makes it harder for yellow lenses to feel blue and blue lenses for yellow.
The reason why the blue light cut lens looks yellow is
This is because the wavelength of about 380 nm to 500 nm, which is called blue light in the visible light passing through the lens, is cut by coating etc., so the opposite color (complementary color) yellow is strongly felt.
3. Recommended color lenses that match the scene
How about choosing a color lens according to the scene where you use sunglasses?
By knowing the functionality and image of the color,
In addition, you will find sunglasses that suit your purpose.
● Gray color lens
It has the effect of absorbing visible light on average and naturally suppressing glare.
It is recommended when driving because the red light is more easily recognized and the red light and the brakes of the car are easily recognized.
Note that it will be darker on average, so if the color is too dark, the contrast may decrease.
● Brown color lens
It has a high effect of cutting short wavelengths called "scattered light", in which light hits air molecules and spreads in all directions.
You can get a clear view by increasing the contrast. You can also expect the effect of blue light cut.
Ideal for field sports such as driving and golf on cloudy days.
● Blue color lens
The effect of suppressing the yellow light that people feel dazzling reduces the glare of the headlights of oncoming vehicles in strong sunlight and at night.
The cool eyes are impressive, and the image is cool.
Please note that the dark blue system may make it difficult to see the signal when driving.
● Green color lens
Cut red and blue moderately for a natural look.
The feature is that the eyes do not get tired easily, and even if it is used outdoors such as camping or the sea, it does not cause discomfort in the field of vision.
The color gives a gentle impression, so it is easy to match with any fashion.
If you're worried about the color of your sunglasses lenses, why not start with the green ones?
● Yellow / orange color lenses
A lens color that brightens the field of vision, not a color that prevents glare.
The contrast improvement effect is higher than that of brown, making it ideal for driving in dim weather such as rain or fog or at night.
Be careful when using it in the daytime or in a bright place as it is highly physiologically irritating and causes fatigue.
[Personal Sunglasses]
Personal sunglasses
Charmant Namiki St. Ginza, just for you to suit your lifestyle
Want to find "personal sunglasses"?
What is "personal sunglasses"?
These sunglasses allow you to freely combine frames and color lenses carefully selected by the staff.
We will find your favorite combination and hand it to you on the spot.
Of course, it is also possible to make prescription and non-prescription sunglasses by choosing the one you like from all the frames that are always on display at the store.
It may take some time to complete, so please contact the staff for details.
On the left photo:
XL1817 BU + green color lens (visible light transmittance 15%)
Bottom left photo:
XL1819 BR + gray / blue color lens (visible light transmittance 53%)