Re: Pupillary distance

On Wed, 19 Jul 2006 14:05:46 +0000 (UTC), Tony Houghton
<this.address.is.fake@xxxxxxxxxxx> wrote:

In <44be355c$0$72148$c30e37c6@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
Dom <dont@xxxxxxx> wrote:

Tony Houghton wrote:
My optician has given me two PD figures: 66 distance and 63 near. I tend
to spend more time reading and using a computer than driving and outdoor
activities. For single vision lenses, which figure would it be better to
use, or should I compromise somewhere in between?


Are you short sighted (minus prescription) or long sighted (plus
prescription)?

R: Sph -6.25 Cyl -0.75 Axis 15
L: Sph -6.50 Cyl -0.50 Axis 42.5

Your dispensing optician should determine the monocular interpupillary distance.
The numbers should look like- 35/31, 33/33, or 32/34, in other words each eye
individually. Very important for complex lens designs (aspherics, atorics, PALs)
and for stronger powers.

I would usually use the distance IPD for both distance and readers, allowing the
principal axis to pass through the center of rotation of the eye.

Hope this helps,



Robert Martellaro
~~~~~~~~~~~~~~~~~~
Optician/Owner
Roberts Optical
~~~~~~~~~~~~~~~~~~
"If a million people believe a foolish thing, it is still a foolish thing."
- Anatole France
.

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