Optical Semi Finished Lens Blanks Middle Index 1.56 Hard Coating Multifocal Vision

Progressive Lens:

1) What is the progressive lens?

There are many types of progressive lenses depending on your vision needs. This is also a great option for multifocal wearers and those with strong prescriptions. And they just happen to be the easiest progressives to get used to. Thought your prescription limited your frame selection? Progressive lenses fit in any frame just like single vision.

Don’t let multi-focal vision cramp your style. You no longer have to be caught peering over bifocals, or switching out two pairs of glasses. With progressive lenses, you can see your entire world in a crisp, clear, seamless way. One pair of eyeglasses can do it all.

Don’t let multi-focal vision cramp your style. You no longer have to be caught peering over bifocals, or switching out two pairs of glasses. With progressive lenses, you can see your entire world in a crisp, clear, seamless way. One pair of eyeglasses can do it all.

2) Why you need progressive lenses?

You may be maturing, but "mature" doesn't have to mean "old." If you are in your 40s (or older) and are having trouble reading fine print with your glasses, progressive lenses offer a younger-looking appearance and other advantages over the lined bifocal lenses your parents wore.

Progressive lenses, sometimes called "no-line bifocals," eliminate the visible lines of traditional bifocals and trifocals and hide the fact that you need reading glasses.

With progressive lenses, no one has to know whether you're wearing glasses just for fashion — or because your arms have "grown too short" for you to see up close.

Semi finished lens:

The starting point for freeform production is a semi-finished lens, also known as a puck due to its resemblance to an ice hockey puck. These are produced in a casting process that is also used to manufacture stock lenses. 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.