What Does Lens Category 3 Mean?
Sat, May 07, 22 By : Koalaeye
How to Adjust Crooked Glasses If one side of your frame looks higher than the other, you need to adjust the arms of your glasses. So, how to adjust glasses? If the right side is higher than the left, you need to gently bend the left arm down at the hinge or where the arm bends behind your ear. If the left side is higher than the left, so just do the same action on the opposite side. When adjusting...

How to Adjust Crooked Glasses

If one side of your frame looks higher than the other, you need to adjust the arms of your glasses. So, how to adjust glasses?

If the right side is higher than the left, you need to gently bend the left arm down at the hinge or where the arm bends behind your ear. If the left side is higher than the left, so just do the same action on the opposite side.

When adjusting crooked glasses, you need to adjust frames a little bit at a time to avoid overcompensating and possibly damaging your glasses. You can run the arms under the warm water but do not running the warm water over the lenses because it will affect the lens coating.


How much do a pure titanium eyeglass frame cost?

What’s the probable price of a a pure titanium frame? The price is not the same, due to customer demand. There are pure titanium frames, Beta titanium frames, and half titanium frames. Online shopping is different from physical stores, and online shopping prices are probably only more than 50% of the physical optical stores. The price of the pure titanium frame is more expensive, be in 500 above commonly. The frame of pure titanium appears sedate mature, suiting the man with a successful career quiet. The price of a titanium frame is relatively cheap, usually around 300. The titanium alloy frame is practical and suitable for students. Prices vary depending on the brand, style, material, and even location of the frame. The price of the eyeglass frame is determined by several aspects, like the brand material, the marketing mode, and so on.



Progressive lenses and single vision lenses

Single vision lenses are the most commonly used prescription lenses. This lens type has a single field of view or a prescription ability of the entire lens and can be used to correct myopia (nearsightedness) or hyperopia (supervision).

Progressive multifocal lenses are lenses with different upper and lower powers for the upper part to see far, and the lower part to see near. The distance from the fixed power above the lens to the fixed power below the lens does not change suddenly, but there is a gradual transition between the two through the gradual change in refractive power.


How to choose blue light blocking glasses?

While trying it on, look at the electronic screen from a distance to see if it stimulates your eyes. Holding the glasses in front of a display screen or under an LED light to see if they reflect blue light on the surface of the lens. It shows that blue-blocking glasses can block blue light. The special blue light flashlight shines on the white cardboard through the lens, the blue light that passes through the blue-blocking lens is noticeably dimmed, while the blue light that passes through the normal lens is not changed at all, which is what the blocking blue light does. You can go to a professional eyeglass shop to detect instruments through the spectrum of professional authority, and the best blue light blocking rate is between 60%-70%.



How Do Bifocal Glasses Work?

After learning some basic information about bifocal lenses, you should know how the bifocal glasses work.

With a pair of bifocal glasses, it would be convenient since they combine all your vision needs into a pair of glasses and you do not need to switch two pairs of glasses frequently. Bifocal glasses are usually designed to for those people who are over the age of 40-45 that need additional help with their near vision due to the effects of presbyopia where the crystalline lens inside the eye naturally begins to lose its ability to focus on near objects.

If you work in the office, you may need a pair of bifocal glasses. The top distance vision in the top of the lens can be used for meetings or presentations and the near vision in the bottom of the lens can be used to look at the computer screen or at documents.


Production technology of progressive lenses

In addition to the evolution in design, the production technology of progressive lenses is also constantly improving: the most representative one is the free-form technology. The emergence of free-form surface technology makes the production more flexible and rapid and can realize a more personalized design. For now, progressive lens design is done on the inside surface of the lens by a computer-controlled lathe, as if a master engraver could carve a piece of stone into a work of art.



How Do Pinhole Glasses Work?

Compared to traditional glasses, pinhole glasses work differently. Traditional glasses correct your vision often by collecting rays of light as they enter the eye and forcing them to converge on the retina rather than behind or in front of it.

However, pinhole glasses limit the amount of light entering your eyes so as to enable people to see more clearly.

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