| Customization: | Available |
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| Function: | for Presbyopic, for Astigmia, UV Protection, for Myopia |
| Material: | Resin |
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| Product Name | 1.56 Round Top Bifocal UC lens |
| Diameter | 70mm |
| Monomer | NK55 (Imported From Japan) |
| Abbe value | 42 |
| Specific Gravity | 1.15 |
| Power Range | SPH: 0.00~+3.00 0.00~-3.00 ADD: +1.00~+3.50 |
What is the RT-28?
RT-28 lenses has two different lens powers that aid in seeing objects at various distances once the aging process reduces your ability to do so. These are usually prescribed to adults older than 40 years, although some children and younger adults may also need them for focusing problems, which strain the eyes while reading.
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.
In using bifocals, you would look through the upper part of the bifocals to focus on farther objects and look down through the lower segment to read or focus on objects at a distance of 18 inches or less.
As people age, they may find that their eyes are not adjusting to distances as they used to. When people inch closer to forty, 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.
Bifocal (also can be called Multifocal) eyeglass lenses contain two or more lens powers to help you see objects at all distances after you lose the ability to naturally change the focus of your eyes due to age.Coating Choice:
Hard coating: make the uncoated lenses are easily subjicted andexposed to scratches
AR coating/Hard multi coating: protect the lens effectively from reflection, enhance functional and charity of your vision
Super hydrophobic coating: make the lenswaterproof, antistatic, anti slip and oil resistance
| 1.499 | 1.56 | 1.61 | 1.67 | 1.74 | 1.59 PC | |
Single Vision |
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Bifocal Lens |
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Progressive Lens |
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Blue Lighting Block Lens |
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Photochromic Lens |
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Blue Block Photochromic Lens |
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Blue Block Progressive Lens |
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Blue Block Photochromic Progressive Lens |
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Sunglasses Polarized Lens |
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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.
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