Do Yellow Lenses Block Uv? | KOALAEYE OPTICAL

Do Yellow Lenses Block Uv?

How to Find Reading Glasses Strengths?

With the increase of age, your vision may begin to decrease and this is an inevitable change in your life. So, when you are trying to decipher some smaller prints, you may need the reading glasses.

When your vision begins to decrease, do not worry, this is a normal change. You will find that the deterioration insight often occurs around the age of 40. The technical term for this condition is called presbyopia, a natural, age-related change in the lens of the eye which makes it more difficult to focus on smaller print and close-up objects.

The condition may become worse as you are near 60 years of age, depending on the type of near distance tasks you performing. Of course, you also need to consider the actual situations.


Warby Parker

WARBY PARKER, one of the most popular eyewear brands in the United States, set up its own experience store in New York City in 2014, where consumers can walk in and out and try them on. They founded a rebellious spirit and lofty goals: to create high-quality, classic production, and the pursuit of fashion and high-quality glasses. Warby Parker's overall design is minimal. They provide many services to help you choose the frame. Almost every frame has a try-on picture and full view and provides a virtual try-on service. Free trial at home, physical experience stores, online virtual tries, and unconditional returns within 30 days really make you feel free.



How much should a pair of prescription glasses cost?

Speaking of glasses, everyone's first feeling may be that it is not cheap to have a pair of prescription glasses. Just such a small pair of glasses, ranging from a few hundred dollars to a few thousand dollars. Why is the difference so big? So some people go online to buy glasses for dozens of dollars as if they look the same. But is it actually the same? There are a lot of differences between the glasses for dozens of dollars and for thousands of dollars, apart from the price. Also, you should be responsible for your own eyes.

Better glasses brands will adopt better designs to ensure beautiful appearance and structural safety, and have stricter quality standards. At first, these glasses are not cheap because the cost has increased a lot. In addition to the brand, different materials, process requirements, and mass production scale will also affect the cost and thus the final selling price. As for the question of what price glasses to choose, my suggestion is to choose the high-priced one within your budget. So, to choose a suitable pair of glasses, what aspects need to be considered?


The weight difference between pure titanium frames and titanium frames

Titanium frames are slightly heavier than pure titanium frames, but they are both high-quality materials, so they are more comfortable on the outside. The specific gravity of pure titanium is generally 4.5, while titanium alloy is 8.9, which means the material is equivalent to half of the titanium alloy. So the frames are lighter in your hand.



Are beta titanium glasses frames expensive?

What’s the probable price of a Beta titanium eyeglass frame? The price of β titanium frame and pure titanium are similar, and the price is usually high, But hundreds to thousands, according to the brand and workmanship. Beta-titanium is usually cheaper than pure titanium. Why are titanium and beta-titanium cheap, but expensive to process into eyeglass frames? The so-called pure titanium and β titanium frames are really titanium alloy frames in the strict sense, and the processing difficulty is really great. IP plating must be used for electroplating, so the processing cost is much higher than that of copper alloy, and the labor cost needs to be included.


Features of acetate frames

These are several powerful attributes of acetate frames, indicating that this material is very unique. The high-quality acetate frame is known for its lightweight, fastness, and thin structure.

  • No harm to the environment.
  • Made of renewable materials.
  • Hypoallergenic.
  • Available in various colors.
  • Can make exquisite designs.
  • Can be adjusted by an optician.


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Does it take time to adjust to progressive lenses?

How long should it take to get used to progressive lenses? I have never worn glasses before.Progressive lenses were developed to allow easy switching between near and far views. Progressive glasses are divided into four parts. The upper part is the far-light region. The lower part is the near-light region, and the middle part is a variable light region. From top to bottom, if the hyperopia film is gradually increased and the myopia film is gradually decreased. The middle variable area is on both sides of the astigmatism area. Because of the prism effect, when you see things, through this area, the object will be blurred, and the eyes will feel uncomfortable. If the height of the frame itself is very small, the transition zone of progressive multi-focus is very narrow, and the eyes may not adapt to the sunglasses. The current design of progressive lenses is still not mature. Imported brands are relatively stable but expensive, and domestic brands are not mature in design. For various reasons, progressive glasses may be difficult to adapt to wearing.

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