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I know that scratches cannot be "buffed out" without affecting the shape and correction of a lens, but I am wondering if they can be filled.

Does anyone know the composition of the raw material...

The URL is "http://www.LensExchange.com".

Normally, when I fail to get a response from a listed contact address, I look the domain name up at the following site:

...

What does the LensExchange.com site do?

On two occasions I have emailed info@LensExchange.com asking for information, and neither query was answered.

Does anyone know "what gives" with the...

Andrea is apparently correct in that glass is considered to be a "supercooled liquid" and not actually a solid at all. At least that is what I have read.

You people are a gold mine of knowledge....

Does aging have any effect on plastic lenses? I have been led to believe that old lenses get both brittle and hard to tint.

Secondly, I have been told the the envelopes that lenses are shipped in...

I found the web site for Duro-Test flourescent lamps (search using "vita-lite" as the search term). They want $50 for a small one!

How well do the quartz lamps work?

As I recall, they generate...

In the Essilor document on tinting which is available in the Files section, a recommendation is made for the "Duro test Vita lite" lamp because of its high Color Rendering Index (96).

I have been...

Regarding marking/blocking polarized lenses,
my present conception is as follows:

1. On a spherical lens, you may safely rotate the lens so that the lensometer dot line coincides with a line...

What is the difference between the "180 line" and the axis of polarization?

My present conception is as follows:

1. On a spherical lens, you may safely rotate the lens so that the lensometer...

One of the edgers that I use at work is an A.I.T Mark 5 Deluxe.

On several of the plastic lenses that I have edged, I have noticed edge chipping sufficient to make the lense unusuable.

These...

1) On the polarized lenses there were two semi-circular indentations on the periphery, 180° apart. I assume that the axis of polarization lies along a line connecting the two.

2) It sounds as...

In the book "Essentials for Ophthalmic Lens Work", at the top of page 107, is a photograph of a Weco (?) pattern-making machine.

Can anyone tell me about how much these machines cost?

Recently, a pair of polarizing sunglasses was submitted to us to build. I was told that polarizing lenses are not spotted in the same way as regular lenses, and that if there was even a minor error...

At the place where I work, we use a Santinelli LE-7070 edger. Normally this edger does quite good work. But in the short time I have worked there (since June 2), the edger has on two occasions...

I recently was hired as an Optical Lab Technician at a firm that fills eyeglass prescriptions.

Is there a recommended reading list for such as me? I am strictly a novice.

Thanks,

Kurt