China Optical Ophthalmic Lenses Hmc Progressive Multifocal 1.499 Semi-Finished Progressive Eyeglass Lens

• Customization: Available
• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Cr39
• Model NO.: 1.499 Semi-Finished Progressive
• Coating: Hc, Hmc, Shmc, Green, Blue
• Abbe Value: 58
• Specific Gravity: 1.32
• Diameter: 75/12&14mm
• 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

What are progressive lenses?

Progressive lenses are no-line multifocal eyeglass lenses that look exactly the same as single vision lenses. In other words, progressive lenses will help you see clearly at all distances without those annoying (and age-defining) "bifocal lines" that arevisible in regular bifocals and trifocals.

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 several vision solutions in one lens

The production of progressives has always been something very special. Progressive lenses allow smooth, clear vision from near to far with one lens - and all without image jumps. Progressive lenses are therefore a unique feat of optical technology, the production of which needs a lot of know-how, a vast amount of optical calculation and exact knowledge of the wearer's personal parameters.

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

 About the Coating Choice:

Hard Coating:

The uncoated lenses are easily subjicted and exposed to scratches, so the hard coating can help the lenses be destoried.

Hard Multi Coating

It also called AR coating, means coat another anti-reflective coating on the hard coating . It can perfectly reduce harmful ray and enhance the vision effect..

Super hydrophobic coating:

Also called crazil coating, can make the lenses waterproof, antistatic, anti slip and oil resistance which can keep half one year ~one year

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.