Basic Info.
Model NO.
1.56 UV420 Blue Cut Flat Top Bifocal HMC
Power Range
Sph:-2.00~+3.00, Add: +1.00~+3.00
UV Value
420
Keywords
1.56 UV420 Blue Cut Lens
Product Description
| Product Name | Diameter | Monomer |
| 1.56 UV420 Blue Cut Flat top Optical Lens | 70mm | NK55 (imported from Japan) |
| Abbe value | Specific Gravity | Power Range |
| 40 | 1.28 | SPH:-2.00~+3.00, ADD: +1.00~+3.00 |
What Is Blue Light?
For the purposes of this article, we'll focus on blue light, one of the many hues in all visible light. Blue light is naturally produced by the sun but also by computer monitors, smartphone screens and other digital devices. In addition to these, blue light is produced by LED and fluorescent lights, and compact fluorescent light bulbs.
Harmful Effects Of The Blue Light
Believe it or not, but today, almost everyone is a victim of Computer Vision Syndrome (CVS), a condition which results from focusing the eyes on a computer or any gadget for prolonged hours.
FT-28 optical lenses
A flat top bifocal lens is offers correction for both near and far distances. It is a multifocal lens commonly prescribed for those suffering from both presbyopia and hypermetropia, a condition whereby, with age, the eye exhibits a progressively diminished ability to focus on near and far objects.
About Our Company: 
FAQ: 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.