Coating scratching off?

What's coming off the front of my glasses? They're only a few months old
and they're very scratched. They are Kodak progressives and the right
lens is much more scratched than the left. In twenty years of wearing
glasses this has never happened. The place I bought them (Americas Best)
said that since I already had them replaced once under warranty (my
puppy destroyed them), they couldn't cover the new damage. But when I
got home I decided to look at the scratches under a 100x microscope and
when I looked at the edges of the glasses it occured to me that some
kind of film is coming off. I believe that this is what is scratched
because the edges of the scratches have the same kind of pattern. It's
sort of like if you put spray paint on a window pane and then scratched
some off with a screwdriver . What is this stuff and what do I tell the
(somewhat dim and apathetic) people at Americas Best? What if they still
don't care? Can I take the rest of the film off myself?

 

Hi,

sounds like the anti glare coating leaves you. Are the light
reflections stronger or maybe whiter where these "scratches" seem to
be?

If the AR coating leaves you it's either a production fault or a heat
problem. Have your glasses become warmer than 80°C (not sure about how
to convert to °F)? Then the size expansion of the plastic lens might
be much bigger than the one of the coating resulting in destruction of
the coating. Everything else should be covered by warranty.

HTH

Sushii


Sascha Büttner

 

I had a set of Kodaks, and after about eighteen months the coating wore out in
patches - from the front the lenses looked like "oil slicks". I wish all
coatings could be consigned to hell ...


Jim