China Hot Selling Custom Semi Finish Optical Lens 1.499 Sf Semi-Finished Progressive Optical Lens Ophthalmic

• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Cr39
• Coating: Hc,Hmc,Shmc,Green,Blue
• Abbe Value: 58
• Specific Gravity: 1.32
• Diameter: 75/12&14mm
• Model NO.: 1.499 SF semi-finished progressive lens
• Power Range: Sph: 0.00~+3.00 0.00~-2.00 Add: +1.00~+3.00
• Transmission: > 97%
• Keywords: 1.499 Sf Semi-Finished Progressive Lens
• Guarantee: 3~5 Years
• Brand: Seesen

Product Description

SEMI-FINISHED 1.499 PROGRESSIVE UC LENS

MATERIAL REFRACTIVE INDEX = 1.499                   TOOLING INDEX = 1.530
Diameter	Nominal Curve	front Radius	T.C	Back Radius	Back T.C	CT/ET	Front Sag Ring 50mm	RX Range Recommened
75	200B	207.67	2.55	87.43	6.06	9/7	1.51	-2.25~-6.50
75	400B	129.37	4.1	121.39	4.37	9/9	2.44	+2.00~-2.00
75	600B	85.5	6.2	82.44	6.43	9/11	3.74	+2.25~+4.00

What are progressive lens?

Progressive lenses offer no-line, multi-focal viewing zones for the most convenient vision correction. If you are over 40 and having difficulty with your vision, chances are you are experiencing presbyopia, the common gradual loss of near vision. But there is good news: you have more choices today than ever before. You don't have to carry a separate pair of glasses for reading or wear lined bifocal lenses like your parents did. Now, you can have no line bifocal reading glasses.





Comparison of physical properties of lenses:

	MR-8	MR-7	MR-174	Polycarbonate(PC)	NK-55	CR39
Referactive Index	1.61	1.67	1.74	1.59	1.56	1.49
Abbe Value	41	32	33	32	37.5	58
Specific Gravity	1.30	1.35	1.47	1.20	1.28	1.32
Diameter	65/70/75	65/70/75	65/70/75	65/70/75	55/60/65/72	55/60/65/70
Impact Resistance	Good	Good	Good	Good	Good	Good
Static Load Resistance	Good	Good	Good	Good	Good	Good

Coating Choices:


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.