CR39 1.499 Uncoated Round Top Semi Finished Lens Blanks In Bifocal Lens
I. Technical Data:
| 1.499 S/F ROUND TOP BIFOCAL BLANKS |
| MARTERIAL REFRACTIVE INDEX=1.499 TOOLING INDEX=1.530 |
| Diameter(mm) | Nominal
Curve | Front
Radius | T.C | Back
Radius | BACK
T.C | CT/ET | Frong sag
Ring 50mm | RX Range
Recommended |
| ɸ70 | 200B | 260.199 | 2.04 | 94.93 | 5.58 | 10.0/14.0 | 1.20 | -4.25Dto-8.00D |
| ɸ70 | 400B | 127.62 | 4.15 | 94.93 | 5.58 | 6.0/8.0 | 2.47 | +2.00Dto-4.00 |
| ɸ70 | 600B | 87.18 | 6.08 | 161.04 | 3.29 | 9.0/6.0 | 3.66 | 0.00Dto+4.00D |
| ɸ70 | 800B | 66.49 | 7.97 | 161.04 | 3.29 | 13.0/6.0 | 4.88 | -4.25Dto+6.00D |
II. Bifocals in General:
 | RT-28 in bifocals - One of the most popular fused bifocal today has a round-shaped on the bottom of the lens, and they called round-top bifocals
- 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.
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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 - The wearers can see the near things by the round shape and see the distance things by the rest of the lenses.
- The wearers don't need change two different visions glasses when they both reading book and watching TV.
- The wearers can keep the same posture when they look both the near thing or far thing.
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III. The process of uncoated lens:
IV. Packing&Shipping:
| Envelop | Choice 1 | Choice 2 |
| White envelop | color envelop with customer design weight: 157g size: 9*9*9cm |
| Outer box | standard export paper carton 38cm*48cm*35cm(0.064 CBMS) |
| about 500 pairs of finished lenses per carton, 21kgs | about 100 pairs of semi-finished lensesper carton, 15kgs |
| Lead time | Depend on the quantity |
| Carrier | We can choose for you or offer us your cooperative company |
| Payment terms | 30% T/T in advance, the balance before shippment |
V. Our service:
1. Our Customer service will begin to track the product processing every day until you receive the goods and verify the product quality when you finish the payment.
2. Online via SKYPE,Whatsapp;Also through mail, voice phone, message could contact us at any time!
3. Follow up the case, record the entire process. Solution will be provide with 24 hours.
Meanwhile,the problem complaint will be reported to QC department.
QC will find defect from which department ,who is in charge to identify responsibility.
4. Collect and record all the voice from each customer respond , suggestion, requirement.
5. We own the best after-sale service,if any problems happen,our team will do our best to solve for customers.
Product Tags:
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Round Top Bifocal Spectacle Lens Blanks , CR39 1.499 Uncoated Optical Lens Blanks Images
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