Ooops! Apparently not as tough as photographic lens multicoatings. I
guess I'd better not use Windex on the glasses.
Chuck Norcutt
Charles Geilfuss wrote:
> Ian,
> As a wearer of eyeglasses since the age of 11 years, I'm a big fan of
> polycarbonate lenses and would never return to glass. Some of this may
> depend on the strength of your prescription and the style of glasses. Mine
> are -6 diopters so it requires a pretty hefty lens. Glass has a bit higher
> refractive index than plastic but is much heavier. The style these days in
> the US is for a smaller diameter lens so it keeps down the edge thickness.
> Hopefully we never go back to the 70's look in eye wear (picture Atom Ant,
> the cartoon character not the rocker). I have found the scratch resistant
> coating to be very effective; I can't remember the last time I got a
> scratch. Just be sure to stay away from cleaners with ammonia, it will take
> it right off.
>
> Charlie
>
> On Tue, May 4, 2010 at 5:58 AM, SwissPace <ian@xxxxxxxxxxxxxxxx> wrote:
>
>> I need new eye glasses, I bought some plastic ones about five years sago
>> but was very dissapointed with the coatings which scratched relatively
>> eassily so reverted back to my glass photochromic lenses.
>>
>> With 5 boys and an active life I need tough ones, This time I was
>> thinking of getting rimless ones and asked about tough lenses. the
>> assistant quoted polycarbonate with photochromic capabilities, however
>> on reading on wikepedia I see that polycarbonate does not have the best
>> optical characteristics and also has a tendency for chromatic
>> abberation, I don't know if this is a problem in general use. I seem to
>> recall Zeiss announcing some lens material as scratch resistant as glass
>> but haven't seen any reviews
>>
>> Has anyone recently studied this recently and have some recommendations
>> ? Thanks in advance
>>
>> IanW
>>
>>>
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