Semi Finished Semi-Finished Cr39 1.499 Sf Flat Top Bifocal FT-28 Eyeglasses Optical Lenses

• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Cr39
• Type: Anti-Reflective Lens
• Coating: Hc,Hmc,Shmc,Green,Blue
• Lenses Color: Clear
• Abbe Value: 58
• Model NO.: SF 1.499 Semi-Finished Flat Top Lens
• Specific Gravity: 1.32
• Power Range: Sph:0.00~+3.00 0.00~-2.00 Add:+1.00~+3.00
• Diameter: 70/28mm
• Transmission: > 97%
• Guarantee: 3~5 Years
• Brand: Seesen
• Keywords: Sf 1.499 Semi-Finished Flat Top Lens
• Trademark: Seesen
• Origin: Danyang, China

Product Description

SEMI-FINISHED 1.499 FLAT-TOP 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
70MM	200B	234.27	2.26	94.93	5.58	10/14	1.34	-5.25D~-8.00D
70MM	400B	127.62	4.15	94.93	5.58	10/12	2.47	+2.00D~-5.00D
70MM	600B	87.18	6.08	161.04	3.29	9/6	3.66	0.00D~+4.00D
70MM	800B	66.49	7.97	161.04	3.29	13/6	4.88	+4.25D~-6.00D
THE ADD FROM +0.75D TO +3.50D.IN 0.25 DIOPTER STEPS

Bifocal Lens:


Bifocal eyeglass lenses contain two powers to help you see objects at all distances after you lose the ability to naturally change the focus of your eyes due to age.

About Our Company:
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.