Basic Info.
Model NO.
CR39 1.499 Round Top Bifocal Lens
Specific Gravity
1.32
Diameter
70mm
Power Range
Sph:0.00~+3.00 0.00~-1.00 Add:+1.00~+3.00
Refractive Index
1.499
Round Top Segment
28
Trademark
Seesen
Origin
Danyang, China
Product Description
1.499 Round-top28 Bifocal Optical Lens
| Product Name | 1.499 Round-top28 Bifocal Optical Lens Uncoated Eyeglasses Lens |
| Diameter | 70mm |
| Monomer | CR39 |
| Abbe value | 58 |
| Specific Gravity | 1.32 |
| Power Range | Sph:0.00~+3.00 0.00~-1.00 Add:+1.00~+3.00 |
Bifocal lens can be called a multi purpose lens. It has 2 different fields of vision in one visible lens. The larger of the lens usually has the prescription necessary for you to see for distance. However, this can also be your prescription for computer use or intermediate range, as you would normally be looking straight when you view through this particular part of the lens. The lower part, also called the window, typically has your reading prescription. Since you generally look down to read, this is the logical place to put this range of vision assistance.
Advantages of round-top bifocals
1. The wearers can see the near things by the round shape and see the distance things by the rest of the lenses.
2. The wearers don't need change two different visions glasses when they both reading book and watching TV.
Jiangsu Seesen Optics is a professional optical lens manufactuer with 20 years of experience in China over 10 years of exporting experience, covering the areas 12000 square meters and having more than 300 employees. 
A wide range of product catalog is one of our advantages, including index 1.499, 1.56, 1.60, 1.67, 1.71, 1.74, and bifocal, progressive,photochromic, semi-finished lens and so on, which can guarantee meeting different requirment of our customers.
| Choice 1 | ||
| Envelope | Carton | Size |
| White Envelope | Stand Export Carton | 38cm*48cm*35cm |
| Choice2 | ||
| You design with your logo | ||
| Type | Lenses Pair | Weight |
| Finished lens | about 500 pairs | 20KGS |
| Semi-finished lens | about 100pairs | 15KGS |
| Lead time | Depend on the quality | |
| Depend on the quantity | We can choose for you or offer us your cooperative company | |
| All the numbers provided above are estimated number, the actual numbers need to be measured according to the order you make. | ||
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.