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Must the height of frame with bifocal/progressive lens be at least 30 mm ?
Yes. If the height is lower than 30mm, you may experience a problem of seeing far or near....
Can I order the frame with plain lenses?
Generally speaking, all the frames can be made with plain lenses. Just choose non-prescription lens when you order....
Can I just buy the frame with no lenses?
Yes, just select “Non-RX” when you select lens, and then leave a message in your order or send your request to service@firmoo.com. If you want to purchase a frame in our website and then take it to the local glasses store to get prescription lens, you may have a problem in inserting...
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 means you can...
Can I order lenses that are both tinted and photochromic?
No. Both work as sunglasses and cannot be combined together....
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...
Can rimless frame be made with photochromic lens?
No. Because rimless glasses are fragile, they are limited to these impact-resistant lenses (super flex lens, and MR-7 lens). Besides, Impact-resistant lens and photochromic lens are incompatible, so the option of the photochromic lens is not available....
Why can't I choose Super Flex Lens with progressive glasses?
Because they are not compatible together....
Do you offer multifocal/progressive sunglasses?
Sorry we don't. Sunglasses can only be used for distance, not for reading, bifocal or progressive. However, you can select progressive prescription glasses with photochromic lens or tint lens, which works as sunglasses. Step 1: Choose a regular frame and then choose the Bifocal/Progressive option. Step 2: choose the lens color....
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.  ...
What index lens do you offer for sunglasses?
We offer 1.56 index lens for sunglasses. If you want to upgrade lens, please contact service@firmoo.com.  However, the lens may not be as thin as you expect if you decide to upgrade them because the frame of sunglasses is generally large. So, if your prescription is strong, you are suggested to...
Can you make non-prescription glasses with blue-light blocking lens?
Yes, we can. Please select Non-RX first and then choose blue-light blocking lens. ...
Polarized Lenses
Polarized lenses contain layers of special filter which will block intense reflected light and terminate the harmful glare from a horizontal orientation. With those polarized layers, light will be filter into one direction so that we will be offered better vision in a higher contrast.Polarized lenses definitely are your best...
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....
Helps for common discomforts
New glasses The light transmittance of new glasses is higher. So you may feel brighter compared to old ones. It usually takes several days to get used to new glasses.    New Prescription Some customers may feel the prescription is strong and a bit painful in the eyes.Usually, it takes about one week to adapt...
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