Which is better CR-39 or polycarbonate? | KOALAEYE OPTICAL

Which is better CR-39 or polycarbonate?

Can you buy a pair of rimless glasses with a high prescription?

Rimless glasses have many benefits. Rimless glasses are a popular choice for eyewear wearers in terms of performance, price, and styling. However, you may wonder if rimless glasses will fit your prescription. The answer is yes, you can get rimless glasses, even with a prescription.


Understand the impact of frame selection on the lens

Frame size is an important consideration when using progressive lenses because some progressive lenses work better in frames of different sizes. Since progressive lenses allow you to see at all distances, it's important that the whole range of vision fits within the frame. Therefore, very short lenses and larger lenses are not suitable for progressive lenses.



Can You Wear Glasses Without Prescription?

So, can you wear glasses without prescription? Of course, you can. You can wear glasses without prescription and they would not cause any damage to your eyes. What’s more, some non-prescription glasses, such as the type that blocks harmful blue light, can be beneficial to your eyes.

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Phone can identify polarized sunglasses.

Take a mobile phone with an LCD screen, turn it to maximum brightness, and look at the LCD screen through the lenses. Make sure the lenses are parallel to the display, and then slowly rotate the phone. When the true polarized lens is rotated at a certain angle, the light from the display becomes obviously darker, or even pitch-black. If they're not dark, they're not polarized sunglasses.

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