Why Do My Transition Lenses Stay Dark? | KOALAEYE OPTICAL

Why Do My Transition Lenses Stay Dark?

h3>Transparent Frames

Transparent frames: as for glasses for round faces, the transparent frames aren’t going away anytime soon. Whether clear or with a faint tint, these frames are almost invisible from a distance and make it easy to clearly see the soft features of a round face. So, if you need a pair of glasses for a round face, try the transparent or clear frames.

Full-rim glasses: round faces look best against strong angular lines, while full-rim glasses can enclose and balance these features. So, you can take the full-rim glasses into consideration when choosing round-face glasses.


What Are Computer Glasses?

Computer glasses or glasses for computer are prescription glasses that are designed to wear when doing computer work. They allow you to focus your eyes on a computer screen. There are other activities such as playing piano or shooting requiring a similar custom fitting.

Glasses for computer use are also known as blue light glasses. They block blue light that causes eye strain due to prolonged viewing of digital screens. Blue light is part of the color spectrum, and everyone is exposed to it through sunlight.

The glasses for computer use have a shorter wavelength than other colors and are emitted by electronic devices such as smartphones, TVs, computers and more. The glare from blue light is what causes digital eye strain or other symptoms. But the glasses for computer can protect your eyes from the damage of the glare.

Depending on an individual’s vision and type of work, there are several options while selecting glasses for computer use.

Monofocal: Monofocal or single-vision glasses are designed for computer work so that they provide the appropriate optical correction for the working distance between the screen and the user’s eye. These glasses allow users to view the whole screen with a minimum up-and-down head movement. However, the disadvantage of the monofocal glasses is that both distant objects and reading materials that are closer than the computer screen will appear blurry.

Bifocal: When it comes to glasses for computer screens, the bifocal glasses would be a choice. Bifocal glasses can be prescribed so that the upper segment is set up for screen distance and the lower segment for work. The disadvantage of these bifocal glasses is that it will blurry if the objects are farther away than the screen.

Trifocal: These trifocal glasses for computers have lenses that combine a segment for far vision, another for near vision and the third one for at the screen distance. The disadvantage of these glasses for computer screen is the limitation to view areas.



Polygonal frame

Polygonal glasses frame is derived from square glasses frame. Some of the frames belong to mechanical cutting, and the lens has an exquisite diamond design, very popular with consumers. The irregular frame makes the glasses more angular and makes the frames less monotonous. It's more stylish and trendy. Gold is more popular, but the price is not high.


The Pros of Transitions Lenses

First, we will show you the advantages of the transition lenses.

Transition lenses or photochromic glasses are quite cost-effective. With the transition lenses, you don’t have to buy two pairs of glasses: prescription glasses or normal glasses and you do not need to switch them frequently. So, they are also convenient and bring you great convenience.

Carrying two pairs of glasses means that you are much more likely to lose or misplace either of them. Having only one pair of glasses can limit the risk of losing glasses. In addition, transition glasses provide more protection than normal sunglasses. They can filter out a good deal of harmful UV rays from the sun so as to protect your eyes.

What’s more, transition glasses come in a lot of different styles, shades, and tints suitable for anyone’s taste, so it won’t limit your fashion and make you look more fashionable.



How to Choose Glasses for Face Shape?

How to choose glasses to suit my face? For the oval face shape, the walnut-shaped frames that are not too deep or narrow are a very good choice. For heart-shaped faces, the light-colored frames and rimless frames that have a light, airy appearance also are good choices. For oblong face shape, the frames with decorative or contrasting temples would be a good choice.

For square face shape, narrow frame styles are recommended. For diamond face shape, rimless spectacles and frames with oval or cat-eye shapes can be good choices. For round face shape, frames with a clear bridge and rectangular frames that are wider than they are deep would be good choices. For base-down triangle shapes, the frames with cat-eye shapes are recommended.

When selecting the eyeglasses shapes, you also need to consider other factors, such as hairstyle, eye color, and so on.

In addition, to choose eyeglasses, you can try Koalaeye Optical, which provides all kinds of glasses frames, eyeglasses, and sunglasses.


What Are Bifocals?

There are several kinds of lenses available in the market. Now, there is a kind of lenses by stacking two different kinds of lenses together and they are called a bifocal lens. Bifocal lenses are lenses with lines separating two different prescriptions. There is a presence of a distance lens at the top and the lower part has a lens that can be used to view the objects placed nearby.

Bifocal lenses are designed for people who have presbyopia, a condition in which the person can’t see the nearby placed objects. Presbyopia is an age-related condition, often occurred when people are over 40 and people often have blurred vision.

At the same time, there are different types of bifocal lenses present and they provide the same user which is the lower part of the lens is used to view the nearby objects or to do work related to reading and writing while the upper part of the lens is used to view the objects placed at a faraway distance or to do an activity like driving.

So, in the following section, we will show you the different types of bifocal lenses.


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What is a progressive lens?

Progressive multifocal lenses are lenses with different upper and lower powers for seeing far above and below for seeing near. The distance from the fixed far power above the lens to the near power fixed below the lens does not change suddenly, but a gradual transition between the two through the gradual change in refractive power. Compared with ordinary lenses, there are many advantages. The appearance of the lens is like a single vision lens, and the dividing line of the power change is not visible. Not only is the appearance beautiful, but more importantly, it protects the age privacy of the wearer, and there is no need to worry about revealing the age secret due to wearing glasses.

Since the change of the lens power is gradual, there will be no image jump. It is comfortable to wear and easy to adapt. So it is easy to be accepted. Because the degree is gradual, the replacement of the adjustment effect is gradually increased according to the shortening of the short distance. There is no adjustment fluctuation, and it is not easy to cause visual fatigue. Clear vision can be obtained at all distances in the visual range.

Such a pair of glasses meets the use of long-distance, near-use and various distances in the middle at the same time. It is especially good news for teachers, doctors, music workers, and computer operators, because these people not only need to see far and near objects clearly, but most of the time they also need to be able to see middle distance objects such as blackboards, piano scores, and computer screens. . This is not possible with any lens other than progressive lenses.

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