At 08:01 PM 5/13/2011, you wrote:
>Zenni Optical on the web has the least expensive glasses I've ever seen,
>$25-$50 max for progressive bifocals with all the coatings etc.  They were
>also rated, in Consumer Reports magazine, one of the best at getting the
>glass ground exactly to the prescription whereas the chain stores fared
>rather poorly.
>
>They have a wide variety of frames from ugly to nice...
>
>Your optometrist will give you your prescription and ask him for you PD
>(pupillary distance).

BTW, your IPD will vary depending on the focus distance, since your
pupils swivel inward when you focus on closer objects. I have a couple
pairs made especially for computer use with a 50-55 cm focus
distance, and the IPD is significantly less (62mm vs. 65mm). If they
were made with the larger IPD, I'd probably get constant headaches and
eyestrain.

>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m



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