Vision in RGP vs. Glasses

I have a minor (-0.75) astigmatism only prescription. When I wear my
glasses I tend to feel a little spaced out and sleepy and have
difficulty staying focused. When I wear my contacts everything is
great, except that I have minor dry eye which makes it hard to wear
them longer than 12 hours, or outside in the wind, etc. With both of
them my acuity seems good, and the glasses are better at night. It
sort of feels like that in the glasses if I relax my eyes while looking
at stuff far away things either go out of focus or my eyes stop
tracking each other, or something. This doesn't happen with contacts,
or with no correction for that matter.

I have two pairs of glasses with almost identical prescriptions and
it's worse in one pair than the other. They came from two different
eye doctors. Any ideas? My only layman's guess is something to do
with the pupillary distance or some induced prism or something? I
understand this type of thing is normally only an issue with high minus
power? Does the RX machine come up with the PD, because I don't
remember anyone ever actually measuring. Maybe I'm just crazy.

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In regard to your glasses, the distance from your pupil will make a
difference. Are the frames different from each other, or are the
lenses made from the same materials? Lots of different factors.
I have heard that RGPs offer a better corrected vision than glasses,
but I've never worn them.
When I wore soft contacts, I found that glasses gave me better
corrected vision.

serebel wrote:

>
>
> In regard to your glasses, the distance from your pupil will make a
> difference. Are the frames different from each other, or are the
> lenses made from the same materials? Lots of different factors.
> I have heard that RGPs offer a better corrected vision than glasses,
> but I've never worn them.
> When I wore soft contacts, I found that glasses gave me better
> corrected vision.

I'm not so much trying to figure out the difference between glasses as
I'm trying to figure out why glasses are objectionable compared to
contacts. The glasses are different though. One set is framed with
plastic lenses, the other rimless with poly.

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