Why Should You Not Want Polarized Sunglasses? | KOALAEYE OPTICAL

Why Should You Not Want Polarized Sunglasses?

Do I Need A Face Shield If I Wear Glasses? Reading Why Should You Not Want Polarized Sunglasses? 5 minutes Next Can I Wear My Blue Light Glasses Outside?

How to Test Blue Light Glasses (Amber and Red Lenses)

This section will show you how to test blue light glasses with amber or red lenses.

1. The Black and Blue Squares Test

1. Prepare black and blue paper.
2. Wear your blue light glasses after sunset and check whether both paper appear black.
3. If they do not appear black, your blue light glasses can’t block all blue light.

2. RGB Color Chart Test

1. Prepare an RGB color chart as follows.
2. Wear your blue light block glasses and look at the chart.
3. After wearing blue light blocking glasses, if the B section becomes black and the G section becomes darken, it shows that your blue light glasses block blue light and some filter some green light.
4. The less bright the green circle with your blue light glasses, the better they are.

RGB

Besides the above ways, you can ask the professional optician to perform a professional blue light glasses test, which would be more reliable. After that, you can know whether your glasses work effectively to block blue light.

What’s more, if you want to purchase a pair of effective blue light blocking glasses, you can try Koalaeye Optical. It is cheap and provides free shipping services.


Contact Lens Materials - HEME Mixed Materials

Using HEMA as the matrix, other monomer components are added to improve the hydrophilicity, oxygen permeability, anti-precipitation, and other functions of the lens.



Driving Glasses - ROCKYOU

Rockyou brand was founded in 2014, with the company adhering to the quality is life concept. With advanced equipment, professional team, and perfect management system, in line with the reputation, quality, service, efficient purpose, the company has gradually grown into a brand of excellence in this rapid economic tide.


Refractive index of spectacle lens

It is generally believed that the higher the refractive index, the better the spectacle lens. Such spectacle lenses are relatively thin, and of course, the price is a bit expensive. When the refractive index increases, the direction of the light entering the lens will change greatly, the focus will move to the lens, the focal length will be smaller, and the diopter will become larger. In order to keep the diopter unchanged, it is necessary to reduce the curvature of the lens, that is, to reduce the curvature of the mirror surface, so that the thickness of the lens can be reduced. This is why the larger the refractive index, the thinner the lens is. Under the same premise of other things, the larger the refractive index, the thinner the lens, the lighter and more beautiful the lens, and the higher the price, but the larger the refractive index is not the better.



Anti-fouling Coating

The lens coated with anti-reflection film is pretty prone to stain, and the stain will affect the transmittance of the lens. Microscopically, the anti-reflection film shows a porous structure, therefore, the oil is very easy to soak in it. The solution is to coat a layer of anti-fouling film with anti-oil performance on anti-reflection film. The film is very thin and will not change the optical performance of the anti-fouling film. The material is mainly fluoride. There are two processes, one is the immersion method, one is the vacuum coating method (the most commonly used).


Can You Get Prescription Gamer Glasses?

Most gaming glasses are not designed to be worn on top of your prescription eyeglasses, but you still have some other options.

You can order gaming glasses with prescription lenses. Make sure the frames are optical grade so they can accommodate lenses of varying thickness.

You can also choose clip-on gaming glasses because they are easy to store and light to wear.

Order daily glasses with anti-reflective or blue-light coating because they can also protect your eyes.


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Can night driving glasses prevent blue light?

Night driving glasses are called night vision goggles. Some night-driving glasses have anti-reflective coatings. Night driving glasses reduce glare by scattering and filtering blue light. Blue light is the shortest wavelength in the spectrum and is possible to cause glare when it enters the eye. The night driving glasses, available in colors from yellow to amber, filter out a lot of glare, and other light, and then make it difficult to see in dark conditions. But tests and studies have shown that night driving glasses don't improve night vision or help drivers see pedestrians faster than they won’t wear them.

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