The bifocal is the most basic multifocal lens. This lens consists of two prescriptions; usually a distance prescription with a reading addition placed in a lower segment.

The flat top is also called the style multifocal lens. This design has a segment width that ranges from 25mm to 45mm. The Flat Top is regarded as one of the easiest multifocal lenses to adapt to, hence it is the most commonly used bifocal (FT 28mm is referred to as the standard size). This lens style is also one of the most

Polycarbonate, also known as poly, was invented by the aerospace industry for gear used on the Apollo space shuttle (helmet visors etc.). It is an impact resistant material that is highly recommended for rimless, safety glasses and sports eyewear. Poly is known for its resistance to chipping or shattering and is 40 times more resistant than FDA requirements.

Packing

1. Envelope:
a) standard white envelope
b) color envelope with customer design (Weight: 157g, Size: 9*9*9cm)

2. Outer Box
a) standard export paper carton (Size: 38*48*35cm, 0.064CBMS)
b) Include about 500 pairs of finished lens (Weight: about 21kg) or include about 100 pairs of 100 semi finished lens (Weight: about 15kg)

Shipping

1. Samples:
a) Delivery time: 3-7 days (by Fedex, DHL, UPS, TNT etc.)
b) Sample is free, but according to our company rule, the shipping cost need to be assumed by customers.

2. Batch Goods:
a) Delivery time: 10-30 days (depend on your quantity, by air, sea or express)
b) Carrier: We can choose for you or offer us your cooperative company

2. We can provide free samples as your request, but according to our company rule, the customer need to assume the shipping cost.

3. 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.

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