Chinese cr39 1.49 Semi finished SF bifocal round top RT-28 UC/HC/HMC eyeglasses lens optical lens ophthalmic lens

I. Product Specification

1.49 Semi-finished Bifocal-RT Optical Lens
Index	Diameter	Abbe value	Monomer
1.49	75 mm	58	AT from Italy
Specific Gravity	Transmission	Guarantee	Power range
1.32	> 97%	5-year	ADD: +100~ +350, Base: 2/4/6/8

II. Product Features

Semi Finished Lenses

Semi-finished lens is the raw blank used to produce the most individualized RX lens according to thepatient's prescription. Different prescription powers request for different semi-finished lens types or base curves.

The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or "curing" of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.

Round Top Bifocal Lenses

You focus through different prescriptions at different distances through the same lens - hence the name. Bifocals (meaning a lens with two points of focus - usually one for distance and one for near) are the most commonly prescribed multifocal lenses. Bifocal the upper part of the lens is generally used for distance vision, while the lower part is used for near vision. Usually, a segment line separates the two. Bifocal sare typically placed so the line rests at the same height as the wearer's lower eyelid. As a bifocal wearer drops his eyes downward to read, the eyes naturally seek out the near-vision portion of the lens.

III. Coa ting Choice

------Uncoating: It means no any other coating, only the true lenses. ------Hard Coating: The uncoated lenses are easily subjicted and exposed to scratches, so the hard coating can help the lenses be destoried. ------EMI Coating : It also called AR coating or hard multi coated/coating, means coat another anti-reflective coating on the hard coating . It can perfectly reduce harmful ray and enhance the vision effect..

IV. Technical Data

V. Product Display

VI. Our Factory

Jiangsu Aogang Optical eatablished in 1996, we are a professional optical lens manufacturer with more than 20 years of experience in China and 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 1.499,1.56,1.60,1.67,1.74,1.59 PC , finished single vision, bifocal, progressive, photochromic, semi-finished lens and so on, which can guarantee meeting different requirment of our customers.

For now, our products have been exported to more than 50 countries over Europe, Asia, Oceania, North and South America and Africa . We are deslious to build business relationship with you. Aogang Optical aims at serving your company.

VII. Exhibition

VIII. Certification

IX. Packing and Shipping

Envelope		Carton	Lenses Pair	Size(cm)	Weight	Lead Time
Choice 1	White Envelope	Stand Export Carton	Finished optical lens: 1 pcs/envelope, 500 pairs/carton	38*48*35	21 KG	Depend on the order quantity
Choice 2	Your design with your logo		Semi-finished optical lens: 1 pcs/envelope, 100 pairs/carton		15 KG
Carrier	We can choose for you or you offer us your cooperative company
All the numbers provided above are estimated number, the actual number need to be measured according to the order you make.

X. FAQ:

Q. How many days will samples be finished? How about mass products?

A. Generally, we need 1~2 days to finish the sample production. As for the mass products, it depends on your order quantity.

Q. How can I get sample from you?

A. Just send us your requirements, then we will send samples accordingly.

Q. What is the MOQ of optical lens?

A. No MOQ for customer if optical lens is in stock.

Q. How do you control lens quality?

A. Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out . Four times quality checking during production process.

Q. How about your optical lens production ability per day?

A. About 20000 pairs/day.

Q. Are you a factory?

A. Yes, we are a professional optical lens manufactruer in China, and have a factory in Danyang city, Jiangsu province.

If you have any problems,  please contact us or visit our official website.