1.56 progressive hmc optical lens
|Place of Origin: Jiangsu, China||Brand Name:Hongchen|
|Model Number: 1.56||Lenses Material:Resin|
|Vision Effect: Progressive||Coating:HMC, HMC EMI|
|Lenses Color: Clear||Refractive Index:1.56|
|Diameter: 70/12mm,70/14mm,70/17mm||Monomer:NK55 (Imported From Japan)|
|Abbe Value:38||Specific Gravity:1.28|
|| Power Range:
SPH:-3.00~+3.00,ADD: +1.00~ +3.00
What is Lens Index?
The lens index refers to the index of refraction (otherwise known as refractive index) of lens material for eyewear. It is a relative measurement number that describes how efficiently the material bends light. Light refraction will depend on how quick light itself passes through the lens.
The difference between 1.56 mid-index and 1.50 standard lenses is thinness. Lenses with this index reduce lens thickness by 15 percent. Full-rim eyewear frames and glasses worn during sports activities are most suitable for this lens index.
The most common materials available for use in lenses used to be glass and a hard resin called CR-39. With the continuous improvement of technology, there are more requirements of CR39(optical/plastic) lenses than glass lenses. We are a manufacturer of optical lens, and in these lenses, 1.56 index lenses are one of the most popular lenses all over the world. Furthermore, lenses with 1.56 index are considered the most cost effective lens on the world market.
Lens materials are classified on their refractive index. This refractive index is the ratio of the speed of light when it travels through air to the speed of light when it passes through the lens material. It is an indication of how much light is bent as it travels through the lens. Light is refracted, or bent, at the front surface of the lens, then again as it exits the lens.A denser material bends light more, so not as much material is needed to achieve the same refractive effect as a less dense material. Hence the lens can be made thinner, and also lighter.
Packaging & Delivery
Delivery & Packing
1) standard white envelops
2) Our brand "Hongchen" envelops
3) OEM envelops with customer's Logo
Cartons: standard cartons:50CM*45CM*33CM(Every carton can include aroud 500 pairs ~600 pairs finished lens, 220pairs semi-finished lens. 22KG/CARTON,0.074CBM)
Nearest shipping Port : Shanghai port
Delivery Time :
1 - 1000
If you have any special requirements, can contact with our sales people, we can do all series service similar as our Domestic brand.
|1.56 Progressive HMC Optical Lens|
|Monomer||NK55 Imported from Japan|
|Coating||Hard and AR coating for both lens surface ,high anti-scratch|
|Coating colour choice||Green/Blue|
|Power range:SPH:-3.00~+3.00 ADD:+1.00~+3.00|
|Progressive Lens Technical Data Sheet|
|TOLERANCE OF FRONT/BACK CURVE： ±0.25|
|POWER TOLERANCE：||S 0.00/ ADD+1.00~ +3.00 ±0.08D|
|S -0.25~ -3.00/ ADD+1.00~ +3.00 ±0.09D|
|S +0.25~ +3.00/ ADD+1.00~ +3.00 ±0.09D|
What are progressive lenses?
Progressive lenses are no-line multifocal eyeglass lenses that look exactly the same as single vision lenses. In other words, progressive lenses will help you see clearly at all distances without those annoying (and age-defining) "bifocal lines" that are visible in regular bifocals and trifocals.
The power of progressive lenses changes gradually from point to point on the lens surface, providing the correct lens power for seeing objects clearly at virtually any distance.
Bifocals, on the other hand, have only two lens powers — one for seeing distant objects clearly and a second power in the lower half of the lens for seeing clearly at a specified reading distance. The junction between these distinctly different power zones is defined by a visible "bifocal line" that cuts across the center of the lens.
Progressive lenses are line-free multifocals that have a seamless progression of added magnifying power for intermediate and near vision.
Progressive lenses sometimes are called "no-line bifocals" because they don't have this visible bifocal line. But progressive lenses have a significantly more advanced multifocal design than bifocals or trifocals.
Premium progressive lenses (such as Varilux lenses) usually provide the best comfort and performance, but there are many other brands as well. Your eye care professional can discuss with you the features and benefits of the latest progressive lenses and help you find the best lenses for your specific needs.
Progressive Lens Benefits
Progressive lenses, on the other hand, have many more lens powers than bifocals or trifocals, and there's a gradual change in power from point to point across the surface of the lens.
The multifocal design of progressive lenses offers these important benefits:
- It provides clear vision at all distances (rather than at just two or three distinct viewing distances).
- It eliminates bothersome "image jump" caused by bifocals and trifocals. This is where objects abruptly change in clarity and apparent position when your eyes move across the visible lines in these lenses.
Because there are no visible "bifocal lines" in progressive lenses, they give you a more youthful appearance than bifocals or trifocals. (This reason alone may be why more people today wear progressive lenses than the number who wear bifocal and trifocals combined.)
Hard Multi Coated
Super Hydrophobic Coating
|Avoid ruining your lenses quickly protect them from getting scratched easily||Reduce glare by eliminating the reflection from the surface of the lens not to be confused with palarized||Make the surface of the lenses super hydrophobic, smudge resistance, anti static, anti scratch, reflection and oil|