What Should Be Considered When Buying Blue Light Glasses?
Be wary of “eye protection” claims. Some businesses advocate their anti-blue light products how miraculous.
Do not try the lens from the unknown lens manufacturer or lens factory. A professional lens factory needs more than ten years or even decades of accumulation, so do not be blinded by dazzling pictures and brand image.
Is blue light blocking worth it?
There are two main problems with anti-blue glasses currently on the market. One is that the place to be prevented is not preventable, and the other is that people have color casts due to wrong protection and aggravate visual fatigue. Studies have shown that our eyes are the most intolerant of blue light in the 400-440 nanometer band. Therefore, current manufacturers mainly block blue light in this band when producing anti-blue glasses. However, the blue waveband of electronic products is between 450 nanometers and 490 nanometers, so most anti-blue glasses have little protection in this waveband. In addition, the blocking rate of anti-blue glasses is 20%~30% to achieve a good anti-blue light effect, but now the blocking rate of anti-blue glasses on the market has basically reached 80%~90%. All in all, these blocking blue light glasses cannot prevent the blue light in the 450-490 nanometer band, and their high blocking rate will also cause a color shift, which makes people more likely to have eye fatigue and headache.
In daily life, the intensity of blue light is low, not enough to cause damage to the fundus, so ordinary people do not need to wear anti-blue glasses unless they are working in extremely strong light conditions or working in special environments. To protect the eyes, it is more important for people to develop good eye habits. For example, wear a pair of suitable glasses and read insufficient light and at an appropriate distance. Avoid using electronic products for a long time. Take a break for 20 to 30 seconds every 20 to 30 minutes, and look at the distance regularly. If you have dry eyes while reading the electronic screen, remember to blink to 12 times per minute. It is best to wear sunglasses when outdoors.
The Benefits of Anti-Reflective Coating
After knowing some basic information about anti-reflective coating, you need to know the benefits of anti-reflective glasses.
Anti-reflective glasses enable more light to pass through your lenses to optimize visual acuity with fewer distractions and the lenses look nearly invisible, which enhances your appearance by drawing more attention to your eyes and helping you make better eye contact with others.
In addition, the anti-reflective coating is especially beneficial when used on high-index lenses, which reflect more light than regular lenses. That is to say, the higher the index of refraction of the lens material, the more light that will be reflected from the surface of the lenses.
What’s more, the modern anti-reflective coatings can reduce the reflection of light from eyeglasses, allowing 99.5% of available light to pass through the lenses and enter the eye for good vision.
Because the anti-reflective coating can eliminate the reflections, it can also make your eyeglass lenses look nearly invisible so that people can see your eyes and facial expressions more clearly. Hence, anti-reflective glasses are more attractive and you can look your best in all lighting conditions.
Anti-reflective glasses have sharper vision with less glare when driving at night and greater comfort during prolonged computer use. So, you can find that anti-reflective glasses come with many benefits.
How Do Prism Glasses Work?
After learning what prism glasses are, you should know how prism glasses work. So, in this section, we will show how prism glasses work.
People with binocular are struggling with seeing two images instead of a single image. The light they see falls in different places on their retinas, which causes distortion and doubling of what they are seeing.
Meanwhile, prism glasses are mostly used to deal with double vision, making it easier to maintain binocular vision, which is the ability to maintain focus on an object with both eyes. With the prism glasses, the light bent before it hits the retina. It is redirected so it falls correctly and the brain can interpret the message as getting in the usual manner, resulting in a single clear picture of seeing.
What is the processing technology to make the lens thin?
For myopic lenses, the larger the diameter, the thicker the edge. Therefore, for customers with high myopia, we will recommend frames with smaller ring diameters, so that the edges of the processed lenses will be thinner. The edges of farsightedness lenses are already very thin (convex lenses are thick in the middle and thin on the sides), and the key determinant of lens thickness is the center thickness. In addition to the refractive index, which affects the thickness of the farsightedness lens, the influence of diameter is more important. Therefore, for patients with farsightedness, the most effective way to make lenses lighter and thinner is to choose a smaller frame and then customize a pair of lenses with the right diameter.
Are titanium glasses really more expensive?
Due to its lightweight, corrosion resistance, non-allergic and memory quality, titanium is becoming a new type of glass frame material. But titanium frames are more expensive than other metal, sheet, or plastic frames. Titanium is not a rare metal. It has the fourth-largest reserves after aluminum, iron, and magnesium, and is 16 times more than the world's copper, nickel, leads, and zinc combined. Scarce resources are supposed to have higher prices. With so much titanium in store, why would titanium frames be more expensive than frames made of other materials?
How to Test Computer Glasses (Clear Glasses)
First, we will show you how to test computer glasses with clear glasses.
1. Ask for Blue Light Glasses Brand Spectrum Report
To find out whether your blue light glasses are the best computer glasses, you should contact the company you bought them from and ask for a spectrum report. It will show you how much blue light your computer glasses can block.
After sending the spectrum report to you, you should make sure that your computer glasses are able to filter at least 30% blue light, otherwise, they are unsafe.
2. Use the Lens Reflection Test
As for how to test computer glasses, you can use the lens reflection test. You can see what color the light is that reflecting off the lenses.
If it reflects the blue light, they are filtering some blue light. If the reflection is violent or purple, the computer glasses may be not effective.
This is a good way for you to perform a blue light test at home.
