I do, and it's generally very accurate. The gizmo is called a
pupilometer, and measures your PD by measuring reflections off the
surface of the eyeball itself.
HOWEVER, it sounds like this one is out of whack.
Were I in your position, I would suggest that you see someone else,
and have it measured again. You measured your PD at 62, your doctor
measured it at 62, and some random person measured it at 67.
I'd already be willing to say that your PD is 62...but it's not going
to hurt to get another opinion. The resulting measurement should
agree with one number or the other...and that should tell you what it
really is. While you're at it, have them write down your monocular
PD...just in case you're not quite symmetrical.
PD does not change as we age (once reaching maturity...25 years old,
or so), so once you have a good measurement, it shouldn't change with
time.
-- Chuck Knight
On Fri, Jun 19, 2009 at 4:17 AM, steven c<[email protected]> wrote:
>
> OK, my manually-measured PD seems to have been 62: my current glasses
> seem to be made to that size, and the eye doctor on my recent checkup
> told me that's what he found (though whether on my face, while
> calibrating the eye-checking thing, or from my current lenses I'm now
> not sure). But at the local glasses place they used an electronic
> gadget that measured my PD as 66 or 67. I was going to order a bunch
> of new pairs but am thoroughly confused. Anyone have experience with
> these PD-measurement machines?
>
> >
>
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