Prescription question

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Ben Fullerton - 30 Oct 2006 04:31 GMT

I am having problems with my new reading glasses and need to know what the
prescription numbers describe.

So far, I am assuming that the "Sphere" refers to magnification (or
equivalent) but do not know what the "Cylinder" and "Axis" specify.

I suppose that one of these numbers refers to correction for
astigmatism(sp?) but do not know which one .... and that still leaves me
with one (for each eye) that I have no thoughts for.

Also, "OD" and "OS" were defined for me a long time ago but I forget which
is right and which is left.

I have the prescription for both my new reading glasses and my old ones,
and want to compare the effects that I am getting with the two. (The new
prescription is better for one eye but worse for the other!)

Any help will be appreciated!

Ben F.

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LarryDoc - 30 Oct 2006 05:14 GMT

> I am having problems with my new reading glasses and need to know what the
> prescription numbers describe.
[quoted text clipped - 16 lines]
>
> Ben F.

Sphere: lens power in + or -
Cylinder: additional lens power at a specific axis
Axis: location or meridian of action of cylinder power.
OD: right eye (from the Latin)
OS: left eye

LB, O.D.

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Liz Day - 02 Nov 2006 02:55 GMT

> So far, I am assuming that the "Sphere" refers to magnification (or
> equivalent) but do not know what the "Cylinder" and "Axis" specify.
>
> Also, "OD" and "OS"...

I think "S" stands for "sinister", meaning left-handed, because people
used to think that being left-handed was creepy and suspicious. So if
"S" is left, then "D" must be right.

The cylinder and axis numbers combined together are the astigmatism;
they are separate from the spherical.

If you have a fast connection, Google and Wikipedia are often good ways
to find basic explanations of unfamiliar terms. I also found
eyeglasses.com to have a helpful amount of detail.

cheers,
LD

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Jacksonfu - 21 Nov 2006 14:22 GMT

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Scott Seidman - 21 Nov 2006 14:53 GMT

"Jacksonfu" <jacksonfu@hotmail.com> wrote in news:1164118944.367777.302220
@f16g2000cwb.googlegroups.com:

> Hi, you guys, I

Can you please stop posting this transparently veiled spam before I feel
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Signature

Scott
Reverse name to reply

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odtobe - 22 Nov 2006 03:31 GMT

I second Scott. Just when you think you can find some pure information
some person has to ruin it by trying to sell something. Don't SPAM it's
just not cool.
odtobe

> "Jacksonfu" <jacksonfu@hotmail.com> wrote in news:1164118944.367777.302220
> @f16g2000cwb.googlegroups.com:
[quoted text clipped - 3 lines]
> Can you please stop posting this transparently veiled spam before I feel
> compelled to post every nonflattering link to this site that I can?

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