How are progressive lenses made?

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How are progressive lenses made? | Yahoo Answers

What is the secret behind the progressive lens? I recently had made one. ... How are progressive lenses made? What is the secret behind the progressive lens?

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Answer:

Lens powers are checked in a machine called a vertometer. The machine we use gives a digital readout...

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How are contact lenses made? Mine always look like perfectly round little dishes of soft plastic.?

I mean, it's not like they have a lot of space to work with. How do they manage to get the prescrption right? And why does it hurt when I put one in the wrong eye?

Answer:

Encyclopedia - Contact Lenses When were contact lenses developed? What types of lenses are available...

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Answer:

Contact lenses are made from a synthetic material that is safe for the eye. After an individual's vision...

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Answer:

Lenses made from polycarbonate, the same type of plastic used for the space shuttle windshield, are...

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Answer:

The first contact lenses were made of glass, which caused eye irritation, and were not wearable for...

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gayly

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Answer:

The optometrist determines what degree of correction your eyes require and the geometry of the lenses...

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Answer:

A lathe turned contact lens is cut and polished on a CNC lathe. The lens starts out as a cylindrical...

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Answer:

Optical glass is supplied to the lens manufacturer typically in the form of a pressed plate or sliced...

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