Chinese wholesale Mineral Semi Finished Lens - CONVOX 1.56 SF Round top bifocal photochromic grey pgx HMC Optical Lens – CONVOX

What Products can we Produce?

Index: 1.499, 1.56,1.60, 1.67, 1.71，1.74, 1.76，1.59 PC Polycarbonate

1.Single Vision Lenses

2. Bifocal/Progressive lenses

3. Photochromic Lenses

4. Blue Cut Lenses

5. Sunglasses/Polarized lenses

6. Rx lenses for single vision, bifocal, freeform progressive

AR treatment: Anti-fog, Anti-Glare, Anti-virus, IR, AR coating color.

Products Description

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Description

As people age, they may find that their eyes are not adjusting to distances as they used to. When people inch closer to forty, the lens of the eyes begin to lose flexibility. It becomes difficult to focus on close objects. This condition is called presbyopia. It can be managed to a large extent with the use of bifocals.
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.

The lower half of a bifocal lens contains the near segment for reading and other close-up tasks. The rest of the lens is usually a distance correction, but sometimes has no correction at all in it, if you have good distance vision.

When people inch closer to forty, they may find that their eyes are not adjusting to distances as they used to, the lens of the eyes begin to lose flexibility. It becomes difficult to focus on close objects. This condition is called presbyopia. It can be managed to a large extent with the use of bifocals.

Product Feature

Semi Finished Lenses

Semi-finished lens is the raw blank used to produce the most individualized RX lens according to thepatient’s prescription. Different prescription powers request for different semi-finished lens types or base curves.

The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or “curing” of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.

How bifocal lens work

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. To correct this problem of distant and near vision, bifocal lenses are used. They feature two distinct areas of vision correction, differentiated by a line across the lenses. The top area of the lens is used for seeing distant objects while the bottom part corrects the near-vision

1. One lens with two points of focus, don’t need change glasses when looking far and near.

2. HC / HC Tintable / HMC / Photochromic / Blue Block/ Photochromic Blue Block all available.

3. Tintable to various fashionable colors.

4. Customized service, prescription power available.

Feature

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.

Coating Choice

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Product packaging

Packaging Details1.56 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

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