Active Member
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[China]
Address: East of Nongangxiao, Situ Town, Danyang City, Jiangsu Province, China
Contact name:Richard Mao
Jiangsu Aogang Optical Glasses Co., Ltd. |
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Japan Monomer 1.56 Round-Top Bifocal Prescription Without Coating In Eyeglass Lenses
I. Specifications:
| Production | 1.56 Round top bifocal lens | Monomer | NK55, imported from Japan |
| Abbe value | 58 | Specific Gravity | 1.32 |
| Diameter | 70mm | Round top segment | 28mm |
| Transmission | 97% | Power range | SPH: 0.00~+-3.00 ADD: +1.00~+3.50 |
II. Round-top Bifocal lens:
When people inch closer to forty, they may find that their eyes are not adjusting to distances as they used to, the lens of the eyes begin to lose flexibility. It becomes difficult to focus on close objects. This condition is called presbyopia. It can be managed to a large extent with the use of bifocals.
To produce plastic bifocal lenses, a hollow with the shape of the segment is made in the concave back surface of the casting die. This means that the casting displays the curved segment and palpable segment edge typical of plastic bifocal lenses. The dioptric power of the segment is achieved solely by increasing the surface curvature, and not by the use of a material with a higher refractive index as in glass bifocal lenses. |
Mould for the production of plastic bifocal lenses |
Whatever the reason one might need to obtain prescription for correction of near-vision, bifocals work similarly. That is, the small lower lens segment (also called "seg") has the refractive power you require to correct near vision while the other part of the lens works for distance vision.
Round segment bifocal have a segment with a dividing line that is a single circular are which is least visible compared to the other bifocals
This round-top bifocal lens is designed to provide the optimal balance between distance vision and near vision. It comes with a 1.56 index and a 70mm diameter for catering to your needs. This round-top bifocal lens is ideal for completing a pair of eyeglasses. |  |
III. Power range:
IV. Our factory:
V. Shipping&Packing:
| Choice 1 | ||
| Envelope | Carton | size |
| White Envelope | Stand Export Carton | 38cm*48cm*35cm |
| Choice 2 | ||
| Your design with your logo | ||
| Type | Lenses Pair | Weight |
| Finished lens | about 500 pairs | 21KGS |
| Semi-finished lens | about 100 pairs | 15KGS |
| Lead time | Carrier | |
| 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 | ||
VI. Purchase Process:
1. If you need the samples, we will check the samples fee and the shipping cost, and we will delivery the samples to you in three days after we receive the payment.
If you do not need the samples, we can send the price list to you.
2. If you are satisfied with our samples or the price list, you can show us your order list.
3. We will do a proforma invoice which show you the total cost including the goods fee, shipping cost, the size of the lenses and some other important information.
4. We will start the order when we receive your despoit, the 30% of the total cost.
5. We need about 15~40 days to produce the order which up to your quantity, and keep update the producing process to you in time.
6. When we finish the producing, we will inform you to pay for the rest of the money. And we will delivery to you asap when we receive the balance.
7. We will offer the tracking number and the documents for you to clearance at customs.
