Basic Info.
Model NO.
semi-finished 1.56 photochromic flat top HMC lens
Diameter
70/28mm
Transmission
> 97%
Guarantee
3~5 Years
Brand
Seesen
Keywords
Sf 1.56 Photochromic Flat Top Bifocal Hmc Lens
Product Description
What is Bifocal Lens?
Bifocal eyeglass lenses contain two 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.
SEMI-FINISHED 1.56 PHOTOCHROMIC FLAT TOP HMC LENS
| MATERIAL REFRACTIVE INDEX = 1.552 TOOLING INDEX = 1.530 | ||||||||||
| Diameter | Nominal Curve | T.C | Rad | Back Curve | E.T | C.T | Sag | Seg Inset | ADD Range | RX Range Recommened |
| 70/28mm | 200 | 240 | 220.53 | 6 | 11 | 6 | 1.18 | 5 | 1.00-3.50 | -2.00D/-5.00D |
| 70/28mm | 400 | 423 | 125.11 | 6 | 8 | 8 | 2.34 | 5 | 1.00-3.50 | -1.00D/-3.00D |
| 70/28mm | 600 | 604 | 87.71 | 6 | 8 | 8 | 3.61 | 5 | 1.00-3.50 | +2.00D/-2.00D |
| 70/28mm | 800 | 802 | 66.06 | 6 | 6 | 8 | 4.9 | 5 | 1.00-3.50 | +2.00D/+5.00D |
Details:
| Indoor Protective Lens | Outdoor Protective Lens |
| In the room or at night, the lenses color are basically transparent, the same as the ordinary lenses, like high light transmission performance, relieve visual fatigue,make you see the world more clear. | Lens under the action of ultraviolet light in the sun color, ultraviolet dark color change, deep, shallow light-colored ultraviolet light, isolated from UV damage, anytime, anywhere to protect your eyes. |
Advantages of photochromic lens
Reduced costs - buying a single pair of dual purpose photochromic glasses that can provide vision for both indoors when clear and providing sunglasses protection outside is more cost effective than buying two separate pairs.
UV protection - Photochromic lenses provide full protection against the harmful UV rays of the sun and direct exposure to sunlight can cause serious eye problems and in some cases blindness.
Photochromic Flat Top lens:
Bifocal lenses are perfect for people suffering from presbyopia- a condition in which a person experiences blurred or distorted near vision while reading a book.
About the Coating:
About the Custom Service:
About Our Factory:
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.
