Optical Lentes Manufacturer Semi-Finished Cr39 1.499 Sf Round Top Bifocal Rt-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.: Semi-Finished Cr39 1.499 SF Round 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
• Keywords: Semi-Finished Cr39 1.499 Sf Round Top Lens
• Trademark: Seesen
• Origin: Danyang, China

Product Description

SEMI-FINISHED 1.499 ROUND-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

What is the RT-28?
 

Round top bifocals are further described by the width of the near segment, measured in millimeters (mm). The most popular RT bifocal is the RT-28, a round top bifocal with a near seg that is 28 mm wide.

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.