How to choose sunglasses that are friendly to the eyes
What kind of image do you have for sunglasses?
Fashion items, things for sports and leisure, entertainers ... Maybe you may have thought of a bit scary image, do not you?
Although it is sunglasses that greatly change the impression of a person, the number of people wearing sunglasses for the health of eyes also increases. Let's take a closer look at sunglasses and eye health.
▶ Sunglasses to protect your eyes from glare and ultraviolet rays
Sunglasses have been used frequently to protect thin eyes of Western pigments from the beginning.
The color of the pupil is the color of the eyeball's "iris (part; corresponding to the aperture function in the camera)". Many people use sunglasses to protect their eyes from the light of the day, because the pale eyes of the color are easy to feel glare.
Especially ultraviolet rays are absorbed not only from the skin but also from the eyes, so there are eye diseases that ultraviolet rays influence.
It can be said that protecting eyes from ultraviolet rays and glare is a major health role to put on the original sunglasses.
▶ Ultraviolet cut is important for eye health
The main eye diseases affected by ultraviolet rays are as follows.
▶ Pterygium (well)
Conjunctiva (white eyes) is a disease invading the cornea (black eyes). There is congestion and foreign body feeling. If you leave it slowly, if it stretches slowly, it will cause blurred vision if it hits the pupil.
When you look in the mirror, you can realize by yourself that you can see that the white eye actually comes into the black eyes. I treat the fistula by resecting it by surgery, but it is a disease with high relapse rate. The conjunctiva on the nasal side is susceptible to ultraviolet radiation at the place where light from the nose reflects most, so many patients develop on the nose side.
▶ Cataract (harmful)
The elasticity of the crystalline lens (the convex lens in the camera) in the eyeball deteriorates and it is a disease in which blurred vision disorder occurs. The biggest cause is the aging phenomenon due to aging, but it is said that ultraviolet rays are also affected by various factors being complicatedly intertwined.
For treatment of advanced cataracts, it is common to remove intraocular lenses by removing opacified lenses by surgery.
▶ The relationship between sunglasses color and ultraviolet rays
When choosing sunglasses actually, does anyone have an image that "sunglasses with somewhat strong color seem to prevent UV rays?"
However, the performance of dark sunglasses and ultraviolet cutting is irrelevant.
The difference in color means that the wavelength of light is different. The rainbow is followed by red, orange, yellow, green, blue, indigo, purple in order from the longer wavelength of light. Because the wavelength is longer than red it is called "infrared", because it is shorter than violet, it is called "ultraviolet light", these are invisible to the human eye.
That is, the transmission of ultraviolet rays does not affect the color. For your health, let's check if it has ultraviolet cut function instead of color intensity.
▶ Which is better, dark or light color?
Dark colored sunglasses are said to be easy to enter ultraviolet rays because they open the pupil and the iris because it is dark and the visibility is difficult to see, but people who are sensitive to dazzle can choose sunglasses of the necessary densities Is required.
Dazzling eyes become tired easily, leading to eye strain. Let's prevent it with sunglasses of darkness that is necessary for your eyes and usage situation. Besides the richness, sunglasses of various colors such as gray, blue, yellow are on sale.
Of course, how it looks also changes with each color. Choose from situations to use, such as driving golf and cars.
When choosing sunglasses for fashion purpose, you tend to be conscious of just whether you suit yourself or not, but I want to choose with awareness of health.