1.49 SF Semi Finished Progressive Multifocal UC Optical Lens

Progressive lenses, 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.

How Do Progressive Lenses Work?

Progressive lenses have zones meant for close-up, intermediate, and distance vision. These zones blend into one another, so the change in power is—you guessed it—progressive, rather than abrupt.
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Products Details

Packaging Details 1.56 hmc lens packing: envelops packing (For choice):  1)standard white envelops 2)OEM with customer's LOGO, have MOQ requirement cartons: standard cartons:50CM*45CM*33CM(Every carton can include around 500 pairs lens,21KG/CARTON) Port：SHANGHAI
Place of Origin: Jiangsu, China
Brand Name:CONVOX
Model Number: 1.49 Semi Finished Lens
Lenses Material:Resin
Vision Effect: Semi Finished Progressive
Coating:UC
Lenses Color: Clear
Refractive Index:1.49
Diameter: 70mm
Monomer:CR39
Item Name:1.49 SF PROGRESSIVE UC
Coating Choice:HC/HMC/SHMC
Photochromic:NO
Guarantee:1 Years
Corridor Length::12mm&14mm&17mm
BASE: 2.00~8.00  ADD: +1.00~+3.00
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.One lens has three functions, intelligent discoloration. The lens adopts the optical fiber rapid discoloration technology to make rapid adjustments to different light rays, so that the wearer can enjoy the pleasure of entering the corresponding environment under suitable discoloration conditions. It changes color instantly under the sun, and the darkest is the same dark color as sunglasses, while ensuring the uniform color change of the lens, and the color of the center and the edge of the lens are consistent. Matching aspheric design and anti-glare function, it is clearer, brighter and more comfortable to wear.

Why we need photochromic lens？

Combining myopia and sunglasses into one, it can solve the problem of unclear myopia, and it can block ultraviolet rays and have super high value, which is more beautiful and lighter. Freely customize the large curved design, a variety of curvatures to match fashionable and sporty frames, to meet the user's unique and personalized needs; a variety of color dyeing film options to meet your color pursuit.Indoor Restore the color of the transparent lens under normal indoor environment and maintain good light transmittance.  Outdoor Under sunlight, the color of the color-changing lens becomes brown/gray to block ultraviolet rays and protect the eyes.

What Are Progressive Lenses, and Should You Be Wearing Them?

As you age, your eyes age too. They’ve put in a lot of hard work over the years, and now they may need a bit of assistance when it comes to seeing things clearly at different distances. For example, you may have noticed that your close vision isn’t what it used to be. Reading a book might require reading glasses, and you may be taking off your normal prescription glasses for certain tasks. It’s a lot of switching around and feeling out what’s comfortable—and that’s where progressives come in.

What Are Progressive Lenses?

Progressive lenses look like any other prescription lens you might have in your glasses. But, they have a hidden talent: each one contains multiple prescriptions, or “powers.” If you need separate eye prescriptions to see clearly at different distances, progressive lenses can likely accommodate all of them with a single pair of glasses. They enable you to do tasks that require close-up vision, intermediate vision, and distance vision without swapping frames or taking glasses off. Progressive glasses go by a few names. You may hear them referred to as “no-line” bifocals, trifocals, or multifocals, or even as varifocals. Some people call them progressive addition lenses, which can be shortened to the (very cute) acronym PAL.

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