What Are Category 4 Sunglasses? | KOALAEYE OPTICAL

What Are Category 4 Sunglasses?

Is Eyes Hurting A Symptom Of Covid? Reading What Are Category 4 Sunglasses? 4 minutes Next Retro Round Sunglasses

Should you choose titanium or pure titanium frames?

In reality, there is no absolute good or bad, if it is comfortable to wear, suitable for personal preference. They are good glasses for a single person, because if someone else wears the right and good-looking glasses, you may not wear the right and good-looking glasses yourself. Therefore, it is still a specific problem, with specific analysis, suitable for their own is good.


Can men wear clear frame glasses?

Clear frames are suitable for young men and women, handsome, with personalities. But if older people wear it, they will look old. Clear glasses frame is more stylish with personality, and it is very fashionable but not for everyone. Choose this kind of frame, you should consider the age, face shape, and so on. Clear frames are usually more suitable for younger people because they are younger and more handsome.



Method of taking off the contact lens

Wash your hands before removing contact lenses, and be careful not to leave long fingernails, to avoid contamination of the lenses by bacteria and nail scratches. Look up, open the upper and lower eyelids with the left index finger and right middle finger. Pinch the middle and lower edge of the lens gently with the thumb and index finger of the right hand, and remove the lens. You can use the index finger first to move the lens down, and then gently pinch the middle and lower edge of the lens with the thumb and index finger belly, and take off the lens.


Are titanium glasses really more expensive?

Due to its lightweight, corrosion resistance, non-allergic and memory quality, titanium is becoming a new type of glass frame material. But titanium frames are more expensive than other metal, sheet, or plastic frames. Titanium is not a rare metal. It has the fourth-largest reserves after aluminum, iron, and magnesium, and is 16 times more than the world's copper, nickel, leads, and zinc combined. Scarce resources are supposed to have higher prices. With so much titanium in store, why would titanium frames be more expensive than frames made of other materials?



Comfort of Glasses

The most important thing when shopping for glasses is comfort. When you choose, you must try it on to see if you feel any discomfort. Whether the glasses can be well put on the upper part of the bridge of the nose, and whether they are light enough and will not cause any burden on the opposite side. In addition, you must see if there is any feeling of dizziness.


Types of Progressive Lenses

At the same time, there are different types of progressive lenses and they are standard PALs, short corridor PALs, computer PALs, and Reading PALs.

Standard PALs must fit your vision needs. They can be added to frames of your choice, but you need to ensure that the frames are the right width and height proportions to grant enough space for the gradient changes in the lens.

Short corridor PALs are made to fit into smaller frames so as to suit a wider range of eyewear styles.

Computer PALs are designed for computer users and other occupations that require strong intermediate and distance vision.

Reading PALs are designed for those who enjoy reading and they can opt for a pair of lenses with a larger close vision zone.


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The taboos of wearing glasses while driving at night

Night driving members should not wear tawny, green, and gray glasses. Tawny glasses can filter out most of the ultraviolet rays, although can make our eyes feel relaxed but easy to make people sleepy. Green glasses will turn red lights into black, directly affecting our judgment of traffic lights, so there is a great safety risk. Grey glasses, due to their low light transmittance, will weaken our line of sight and affect our observation of the road.

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