What Prescription Is Legally Blind? | KOALAEYE OPTICAL

What Prescription Is Legally Blind?

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What Glasses Lens Thickness Should I Choose?

In this section, we will show you how to choose glasses lens thickness. Lens thickness will depend on the strength of your prescription, your pupillary distance, the size of the frame and the lens material. Usually, high prescription glasses are thick.

If you have moderate nearsightedness, you should choose thinner lenses at the edge thickness of your lenses will be more visible. If your sphere prescription is between -2.50 and -4.00, the lenses with a refractive index of 1.6 would be an ideal choice. A lens with a refractive index of 1.67 is suitable for sphere prescription between -4.00 and -6.00, and any prescription over that a lens with a refractive index of 1.74 will be more suitable.

So, when you purchase prescription glasses, consider the glasses’ lens thickness also. If you want to get a pair of prescription glasses online, Koalaeye Optical is recommended. It is an online optical store and provides all kinds of eyeglasses, sunglasses and frames. Besides, these glasses are stylish and cheap. If you purchased, the glasses will be mailed to you with great convenience.


Lunor - Glasses For Men

Many of Lunor's metal frames are made from high-quality titanium, gold, and stainless steel. In addition to the special process of making titanium, all-metal frames are made by hand in a factory in Germany, fully reflecting the craftsmanship and thought behind the production of the brand. The texture and professional demeanor of the glasses are strong. The brand is very good at combining classical and modern. What we can see is that the nose pad and the frames are made of pure titanium, so there's no allergic effect.



What Face Shapes Do Clubmaster Glasses Suit?

As clubmaster glasses and clubmaster sunglasses are popular, you may ask what face shape clubmaster glasses can suit. Characterized by a thick browline right over the lenses, clubmaster glasses or clubmaster sunglasses can be worn by all face shapes, from triangular to oval to diamond. These versatile glasses and sunglasses are supported by a thin metal frame that will make any person in any outfit look great. You can read the following detailed information.

  • Triangle face: The frames that are bolder at the top and taper off to a neutral look at the bottom suit the best.
  • Round face: If you have a round face or fuller face, choose edges that are angular and taper off that contrast with your frames.
  • Heart face: These people with the heart-shaped face should choose light-shaded and bottom-heavy frames.
  • Rectangular face: These people can choose a browline frame to complement your face shape.
  • Oval face: If you have an oval face shape, any frames can suit your face very well.

However, if you do not what face shape you have, you can click here to have a check. If you want to get a pair of clubmaster glasses or clubmaster style sunglasses, Koalaeye glasses are recommended. They come at a cheap price and the glasses will be mailed to you with great convenience. Therefore, Koalaeye clubmaster glasses will bring you great surprise.


Why do you need blue-light-blocking glasses?

High-energy blue light would penetrate the lens and directly enter the retina, causing the atrophy and even death of retinal pigment epithelial cells. The death of light-sensitive cells will lead to vision loss or even complete loss, which is irreversible. Blue light at 415 nanometers to 455 nanometers is short, that is, high energy and harmful blue light. This band of blue light would penetrate the lens directly to the center of the macula, causing irreversible damage to the macula. Excessive intake of high-energy blue light would cause confusion of our biological clock, so the damage of blue light should be paid enough attention to.



Do all glasses come with nose pads?

The glasses without the nose brace are plate glasses. In reality, there is still a nose pad, but it is relatively small and it's part of the frame. The westerners have high nose bridges, and many glasses have no or very small nose pads. For example, Harry Potter's glasses have no nose pads. European and American brands will change their nose pads for the Asian market. Eyeglasses without a nose pad rely on the bridge of the nose to support the center beam. It's hard for Asians to stand up, and their eyes are more protruding than sunken like westerners. Glasses are usually demanded to keep a 12mm distance between the lens and the eyeball, otherwise, the optical performance will have a great impact.


Use them in exchange for a new pair.

A trade-in would be an excellent option. The old eyeglasses can be recycled by taking them to the optical shop, which is a low carbon and environmentally friendly.


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Oversized Tortoise Glasses- Friendship | KoalaEyeOversized Tortoise Glasses- Friendship | KoalaEye
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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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