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Lens Thickness/ Lens Index
a.    Standard Spheric 1.50 lens Standard index 1.50 lenses are the basic CR-39 spheric lenses, come with anti-scratch hard coating and 85-90% UV protection coating (Please choose higher index lenses to get 100% UV protection), and are shatter-resistant, suitable for spherical power +/-2.00 or below, and cylindrical power +/-1.50 or below. b.    Super Flex Aspheric 1.56 lens Super...
What type of bifocal lens do you use?
We use Flattop or Roundtop for all our bifocal lenses. Flat-top bifocals Round-top bifocals...
What coatings and add-ons do you offer for your lenses?
We offer anti-scratch, anti-reflective/anti-radiation, tint, mirror, Super Hydrophobic Water Resistant A/ R, Oleophobic Fingerprint Resistant A/R Coating and photochromic add-ons. a.   Anti-scratch All our lenses come with an anti-scratch hard coating to avoid lenses being easily scratched, ensuring vision clarity and durability. b.   Anti-reflective/Anti-radiation Anti-reflective coating reduces the reflection of light, enhances the light transmission through...
Do you offer bifocal or progressive lenses?
Yes, we do process bifocal lenses and progressive lenses. You may start by selecting the proper frame with height over 30mm for making bifocal or progressive lenses and then input your prescription as requested. Please note bifocal/progressive lens are needed when there is ADD in your prescription.  Check here for frames available with bifocal/progressive...
Do you have prism lenses?
We only provide single vision prism lenses right now. Just upload the picture of your original prescription and then our professional will help check it. ...
Can I buy lenses only to fit into my old glasses frame?
No, we offer our lenses with our frames as a whole package. We strongly suggest not to do it as the lenses may not be suitable for your old eyeglasses frame if you buy them only. What's more, the best service life of a frame is about one year. The frame may...
How to choose lenses?
This mainly depends on the strength of your prescription. The higher the prescription, the higher index is required for the lenses. Selecting a higher index will ensure your lenses are as light and thin as possible. This will improve the overall look (by being thinner) and comfort (by being lighter)...
What is the difference between single-vision and bifocal/progressive lenses?
Single vision lenses refer to lens that have only one use, to see objects in the distance,  to see intermediate like computer or phone, or to see near for reading (reading glasses), while bifocals/progressives are a type of prescription eyeglasses that can be used to correct both near and farsightedness. This...
Do the lenses include any coating?
All of the lenses have an anti-scratch coating and the coating is free. The sunglasses lens and 1.60/1.67/1.74 index lens have 100% UV protection coating. Super flex 1.56& 1.60 index lens also come with anti-reflective coating. If you need any other coatings, you can choose it when you select lens. Standard...
Which kind of lenses are free?
Standard index 1.50 lens are free....
What're the difference between Tint lens, Photochromic lens and polarized lens?
The effect of tint lens is thoroughly and only one tint color no matter indoor or outside. Photochromic lens are transparent indoor while color darkens outside. Polarized lens have the same color indoor and outdoor, and their effect is better than tint lens and can filter harmful UV....
Photochromic & Transitions® Lens Introduction
We have 2 kinds of Photochromic lens, one is Advanced Photochromic and the other is Photochromic Transitions® Signature VII. Photochromic Transitions® Signature VII is available for Super Thin Aspheric 1.60 index lens only.  Photochromic Transitions® Signature VII is fully clear indoors and darker outdoors. Using exclusive Chromea7™ photochromic technology, they are more reactive to bright sun, partial sun and...
How to change the lens of safety/sport glasses?
Step 1: Hold the goggles on the nose bridge; cover the shade with a cloth in case it is scratched.  Step 2: Pull out the shade from the inner side; then the whole shade will be taken off.  ...
Spherical VS Aspherical Lens (video)
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Lens Functions
1.   Single vision lens Single-vision prescription lenses are for people who need to correct one field of vision, either for distance, intermediate (computer), or near vision (reading). They contain the same amount of vision correction throughout the entire lens. There is no ADD in the prescription in the single vision prescription and...
Lens Color
1.   Tint Tint is the permanent colors added to the lens. The effect of tint lens is thoroughly and only one tint color no matter indoor or outside. Now we have light color tint and dark color tint. Light is about 20% tint and dark 80%. Dark tint lens are more suitable...
Difference between Spherical Lens and Aspherical Lens
Generally speaking, spherical lens are thick and the image through the lens will be distorted. While, with the same prescription and index, aspherical lens are thinner, lighter and more comfortable for wearers. Aspherical lens have wide vision and the image through the lens is more real and natural. Wearers will...
What is the material of your lens?
Our lenses are made of resin, which are lightweight and highly impact-resistant. Resin lenses also have a strong ability to block ultraviolet radiation to protect your eyes....
How to use progressive glasses?
It is of great importance to learn how to use progressive glasses and may take several weeks to get used to.  THE UPPER portions of your lenses are clear. As you lower your eyes, the magnification increases gradually allowing you to see better at different close-up distances. ADAPTING to any new lens design requires...
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