Optical Lens Photochromic Adaptive Lenses Flat Top FT-28 1.56 Index

• Function: for Presbyopic, for Astigmia, UV Protection, for Myopia
• Material: Nk55, Imported From Japan
• Abbe Value: 42
• Specific Gravity: 1.16
• Power Range: Sph:0.00~+3.00,0.00~-4.00,Add:+1.00~+3.50
• Refractive Index: 1.56
• Model NO.: 1.56 Photochromic Flat Top
• Diameter: 70/28mm
• Keywords: Spectacle Lenses Manufacturers

Product Description

Product Name	1.56 Photochromic  Flat Top Lens
Diameter	70MM
Monomer	NK55 (imported from Japan)
Abbe value	42
Specific Gravity	1.16
Power Range	SPH:0.00~+3.00,0.00~-4.00,ADD:+1.00~+3.50
Guarantee	3~5 year
Photochromic	Grey/Brown

1.What is the 1.56 Photochromic Flat-top lens?

 

Photochromic: 

Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight. Other terms sometimes used for photochromic lenses include "light-adaptive lenses" and "variable tint lenses."

 

Flat-top:

Flat-top lenses were used to correct two different eye prescriptions. Bifocals were easy to spot - they had a line dividing the lens in two, with the upper half for distance vision, and the lower half for reading. 

2.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.


 3.Why choose the Flat-top?

Bifocals have 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.

About Our Company:
FAQ:

Q. How many days will samples be finished? How about mass products?

A. Generally, we need 1~2 days to finish the sample production. As for the mass products, it depends on your order quantity.

 

Q. How can I get sample from you?

A. Just send us your requirements, then we will send samples accordingly.

 

Q. What is the MOQ of optical lens?

A. No MOQ for customer if optical lens is in stock.

 

Q. How do you control lens quality?

A. Producing process is in vacuum dust-free shop, like prepare material, mixed material and take out .Four times quality checking during production process.

  

Q. How about your optical lens production ability per day?

A. About 20000 pairs/day.

 

Q. Are you a factory?

A. Yes, we are a professional optical lens manufactruer in China, and have a factory in Danyang city, Jiangsu province.