What prescription is legally blind? | KOALAEYE OPTICAL

What prescription is legally blind?

Trifocal vs Progressive Lenses: Which Are Better?

Each type of glasses has advantages and disadvantages. Progressive glasses offer the wearer a youthful-looking eyewear option, and they can be customized for specific use. Trifocal glasses are not customizable like progressive, but instead, come in a few standard configurations. Trifocal glasses offer a wider intermediate viewing area than progressive lenses do. Hence, trifocal glasses could be more comfortable for computer use.

In addition, trifocal glasses are cheap than progressive lenses. So, they tend to be more affordable.

What’s more, progressive may be used in prescription sunglasses or in photochromic glasses. Trifocal lenses are mostly used in sunglasses or light adaptive glasses, but these may require a special order.

So, from the above information, you have learned some basic information about trifocal lenses and progressive lenses. As for trifocal vs progressive lenses, you may also have gotten some answers.

Therefore, if you want to buy a pair of trifocal glasses or progressive glasses, you can try Koalaeye Optical. It is an online glasses store, providing all kinds of glasses, sunglasses, and frames. Besides, these glasses are stylish and come at a cheap price. With your great convenience, the package will be mailed for you for free.


Anti-fogging lens

The surface of the lens is coated with a layer of anti-fogging top film. The anti-fogging function of the lens can be activated by wiping the lens with a professional anti-fogging lens cloth, which can achieve a better anti-fogging effect. Choose this anti-fogging lens and wipe it with the corresponding anti-fogging lens cloth. IT is easy to use, and the anti-fogging effect is ideal, used for a long time. They cannot be wiped and washed.



Are blue light glasses good for driving at night?

Are blue light glasses helpful when driving at night? The answer is not necessarily. Anti-reflective coating on glasses is beneficial. But blue light blocking won't have any effect on your driving at night. If your glasses have an anti-reflective coating, then they might be helpful for night driving. Otherwise, they won't have any impact.


Round face with square glasses

A round face is a relatively round type. This type of face looks very round but lacks a little beauty. The biggest feature of a round face is that it is softer, and the contours and features of the face will look gentle. However, it lacks a little tough line, so it is most suitable to choose square glasses for a round face. It can add a little small line to your round face and it will look more beautiful.



Cellulose Acetate

Acetate is a kind of thermoplastic resin obtained by esterifying acetic acid to acetic anhydride under the action of a catalyst. Acetate is resistant to water, gasoline, mineral oil, and lipids, weak alkaline solutions, and acids, excellent weather resistance, not resistant to ethanol, strong acids, and strong alkaline solutions. During thermoforming, it is very necessary to dry the material before forming. Acetate was born in the early 20th century, and was successfully trial-produced and industrialized by the UK in the early 1920s. At present, it is the second-largest variety in cellulose fiber after viscose fiber. Acetate can be used to make textiles, cigarette filters, film bases, and plastic products.


BLUPOND night driving glasses

TAC Semi-polarized Blue light goggles are designed to change your perspective to yellow with computer blue light polarization. Anti-glare high-definition vision blue-blocking glasses protect eyes from blue light and reduce the contrast of bright blue/white glare and flash. The anti-glare night glasses limit distortion. In addition to polarized driving glasses, you can receive a night vision glasses accessory set, with the EVA glasses hard case, screwdriver, sunglasses bag, microfiber cleaning cloth, glasses clip, and night driving glasses gift box.


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Who is suitable to wear progressive lenses

Progressive multifocal glasses are suitable for people with presbyopia or visual fatigue, especially teachers, physicians, musicians, computer operators, etc. They not only need to see far and near objects, but also most of the time, need to see objects at intermediate distances such as blackboards, piano scores, and computer screens. A pair of scientifically customized progressive multifocal glasses can simultaneously meet the needs of distance use, near use, and various distances in between. Some special young myopia patients wearing progressive multifocal glasses can also be used to correct the refractive power and effectively relieve eye fatigue.

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