Middle Index 1.56 Photogrey Round Top Bifocal Lens Photochromic Rt-28 Hmc Eyeglasses Optical Lenses

• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Nk55, Imported From Japan
• Type: Photochromic Lens
• Coating: HMC
• Lenses Color: Grey
• Abbe Value: 42
• Model NO.: 1.56 Photogrey RT-28 HMC
• Specific Gravity: 1.15
• Coating Choice: Hmc/Shmc
• Power Range: Sph:000~ +300 000~-200 Add:+100~+300
• Transmission: > 97%
• Diameter: 70mm
• Guarantee: 3~5 Years
• Key Word: 1.56 Photogrey Round Top Bifocal Hmc Lens
• Trademark: Seesen
• Origin: Danyang, China

Product Description

Product Name	1.56 Photogrey Round Top Bifocal HMC Lens
Diameter	70mm
Monomer	NK55 (Imported From Japan)
Abbe value	42
Specific Gravity	1.15
Power Range	Sph:000~ +300 000~-200 Add:+100~+300

What is Bifocal Lenses?

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.


How the photochromic work?
 

The molecules responsible for causing photochromic lenses to darken are activated by the sun's ultraviolet radiation. Because UV rays penetrate clouds, photochromic lenses will darken on overcast days as well as sunny days.

Photochromic lenses typically will not darken inside a vehicle because the windshield glass blocks most UV rays. Recent advancements in technology allow some photochromic lenses to activate with both UV and visible light, providing some darkening behind the windshield.

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.