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Optical Semi Finished Lens Blanks Middle Index 1.56 Hard Coating Multifocal Vision
Home » Products » Semi Finished Lens » SF Progressive Lens » Optical Semi Finished Lens Blanks Middle Index 1.56 Hard Coating Multifocal Vision
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Optical Semi Finished Lens Blanks Middle Index 1.56 Hard Coating Multifocal Vision

  • SF 1.56 Progressive HC Anti-Scratch
  • Aogang
  • SF 1.56 Progressive HC Anti-Scratch
  • 1.56
  • 75/12&14MM
  • NK55,imported from Japan
  • 37.5
  • 1.28
  • 97%
  • HC/Anti-Scratch
  • Base:2/4/6/8 ADD:+100~+350
Quantity:

Technical Data


  1.56 S/F SHORT CORRIDOR PROGRESSIVE BLANKS
  MARTERIAL REFRACTIVE INDEX=1.56                                                            TOOLING INDEX=1.530
Diameter(mm)Nominal
Curve
Front
Radius
T.CBack
Radius
BACK
T.C
CT/ETFrong sag
Ring 50mm
RX Range
Recommended
ɸ75300B337.351.5787.176.087.0/13.00.93-6.75Dto-8.00D
ɸ75400B149.543.54104.65.077.0/9.02.10+2.00Dto-4.25
ɸ75500B90.955.83104.65.0710.0/9.03.500.00Dto+3.50
ɸ75600B67.167.8987.176.089.5/6.04.83-4.25Dto+6.00


Features

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.

 

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

 

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.

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


Coating

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

Hard Coating: also called Anti-Scratch to make the uncoated lenses are easily subjected and exposed to scratches


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