Hot Selling Eyeglasses Lens Semi-Finished 1.56 Photo Grey Hmc Lentes Fast Change Optical Lenses

• Customization: Available
• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Resin
• Model NO.: Semi-Finished 1.56 Photochromic HMC
• Type: Photochromic Lens
• Coating: HMC
• Lenses Color: Grey
• Abbe Value: 42
• Specific Gravity: 1.16
• Power Range: Sph: -20.00~+11.00 Cyl: 0.00~-6.00
• Diameter: 65/70mm
• Transmission: > 97%
• Guarantee: 3~5 Years
• Keywords: Sf 1.56 Photochromic Lens
• Brand: Seesen
• Trademark: Seesen
• Origin: Danyang, China

Product Description

What Is Photochromic Lens?

Photochromic lenses are available in nearly all lens materials and designs, including high indexes , bifocal and progressive. An added benefit of photochromic lenses is that they shield your eyes from 100 percent of the sun's harmful UVA and UVB rays.

Because a person's lifetime exposure to sunlight and UV radiation has been associated with cataracts later in life, it's a good idea to consider photochromic lenses for children's eyewear as well as for eyeglasses for adults.

SEMI-FINISHED 1.56 PHOTOCHROMIC HMC LENS

MATERIAL REFRACTIVE INDEX = 1.552                     TOOLING INDEX = 1.530
Diameter	Nominal Curve	T.C	Rad	Back Curve	E.T	C.T	Sag (50mm)	RX Range Recommened
70mm	plano	0.04	11250.02	6	13.5	6	0	-8.00D/-12.00D
70mm	50	53	1000.22	6	12.7	6	0.3	-7.00D/-10.00D
70mm	100	103	511.8	6	12.1	6	0.6	-6.00D/-8.00D
70mm	200	205	258.01	6	11	6	1.27	-5.25D/-8.00D
70mm	400	401	132.16	6	10	8	2.18	-2.25D/-5.00D
70mm	500	498	106.32	6	7.1	7	2.98
70mm	600	604	87.71	6	8	8	3.57	+2.00D/-2.00D
70mm	700	710	74.57	6	7	9	4.25	+1.00D/+2.00D
70mm	800	795	66.67	6	7	9.5	4.9	+2.25D/+5.00D
70mm	1000	1000	52.99	4	5	12	6.27	+5.25D/+8.00D
70mm	1200	1200	44.16	4	5	15	7.75

Details
Modern photochromic lenses tend to be plastic and instead of silver chemicals they contain organic (carbon-based) molecules called naphthopyrans that react to light in a slightly different way: they subtly change their molecular structure when ultraviolet light strikes them.


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About our Factory
FAQ:
1. Are your company a manufacturer or a trade company?
We are a manufacturer with many years exporting experience. Our factory is located in Jiangsu province.

2. Can your products be customized?
We accept OEM &ODM orders. Actually most of our products are customized. We will try our best to fulfill your requirements about the material, the size, the printing.

3. How can I get sample from you?
Just send us your requirements, then we will send samples accordingly.

4. How many days will samples be finished? How about mass products?
Generally, we need 5-7 days to finish the sample production.As for the mass products, it depends on your order quantity.

5. How do you control lens quality?
Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process.