On 5/20/2011 1:08 PM, Chris Loper wrote:
> PD
>
> A ruler works fine, but better if you get someone else to do the measurem=
ent
> rather than trying to look in a mirror.
> Last time I bought glasses from Zenni, they sent a special little ruler w=
ith
> a slot in the middle.
> Cute, but I don't think it is much more accurate.
> If you don't have someone to help you, get your digital camera and a rule=
r,
> and try this java app,
>     http://www.specsonthenet.com/pupillometer.jsp
> This seemed less accurate to me, but in any case I don't think a couple m=
m
> is going to matter.
> Be sure to note what Carey said and adjust for long distance vs. reading
> glasses by focusing at the appropriate distance while getting measured.
Cool!  Thanks for that.   I'm having a bit of trouble finding someone I=20
trust to hold the ruler and account for parallax.   ;)
  I'll try it in a bit.

--=20
Joe Wronski
Stillwater Embedded Engineering
www.stillwatereng.net

--=20
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