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Tony Houghton
medicine forum beginner
Joined: 19 Jul 2006
Posts: 5
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 Posted: Wed Jul 19, 2006 12:34 pm Post subject:
Pupillary distance
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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?
--
The address in the Reply-To is genuine and should not be edited.
See <http://www.realh.co.uk/contact.html> for more reliable contact addresses. |
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JohnDoe
medicine forum Guru
Joined: 14 Jun 2005
Posts: 364
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| Posted: Wed Jul 19, 2006 1:36 pm Post subject:
Re: Pupillary distance
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Tony Houghton wrote:
| Quote: | 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?
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Are you short sighted (minus prescription) or long sighted (plus
prescription)?
Dom |
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Tony Houghton
medicine forum beginner
Joined: 19 Jul 2006
Posts: 5
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| Posted: Wed Jul 19, 2006 2:05 pm Post subject:
Re: Pupillary distance
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In <44be355c$0$72148$c30e37c6@ken-reader.news.telstra.net>,
Dom <dont@spam.me> wrote:
| Quote: | 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
--
The address in the Reply-To is genuine and should not be edited.
See <http://www.realh.co.uk/contact.html> for more reliable contact addresses. |
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Dr Judy
medicine forum Guru
Joined: 07 May 2005
Posts: 304
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| Posted: Wed Jul 19, 2006 4:12 pm Post subject:
Re: Pupillary distance
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Tony Houghton wrote:
| Quote: | 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?
--
The address in the Reply-To is genuine and should not be edited.
See <http://www.realh.co.uk/contact.html> for more reliable contact addresses.
|
If the glasses are your distance correction (make distance clear but
also used for reading and computer), then you would use the distance
pd, if they are reading glasses (you are over forty and these glasses
will blur your distance vision) you would use the near. Usually the
glasses fitter figures this out for you.
Dr Judy |
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Tony Houghton
medicine forum beginner
Joined: 19 Jul 2006
Posts: 5
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| Posted: Wed Jul 19, 2006 5:18 pm Post subject:
Re: Pupillary distance
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In <1153325555.229521.241290@h48g2000cwc.googlegroups.com>,
Dr Judy <mpace99@rogers.com> wrote:
| Quote: | 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?
If the glasses are your distance correction (make distance clear but
also used for reading and computer), then you would use the distance
pd, if they are reading glasses (you are over forty and these glasses
will blur your distance vision) you would use the near. Usually the
glasses fitter figures this out for you.
|
I'm short-sighted and not old enough to need bifocals, varifocals or
separate reading glasses, so I suppose I should go for the far figure.
However, I did notice with my new glasses with the chromatic aberration
I could see OK in the distance but it was difficult to focus on text
with both eyes at once.
--
The address in the Reply-To is genuine and should not be edited.
See <http://www.realh.co.uk/contact.html> for more reliable contact addresses. |
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Robert Martellaro
medicine forum Guru Wannabe
Joined: 03 May 2005
Posts: 187
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| Posted: Wed Jul 19, 2006 9:56 pm Post subject:
Re: Pupillary distance
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On Wed, 19 Jul 2006 14:05:46 +0000 (UTC), Tony Houghton
<this.address.is.fake@realh.co.uk> wrote:
| Quote: | In <44be355c$0$72148$c30e37c6@ken-reader.news.telstra.net>,
Dom <dont@spam.me> 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
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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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