trapezoid vision with new eyeglasses

This is the first time I am using prescription eyeglasses. My RX is:

right: -.75 sph,
left -.25 -1.25X180.

When I look at my computer screen with the glasses on, the screen
looks like a trapezoid on its side. The right side is narrower than
the left. The effect is not as noticable when I look at distant
objects, like TV from a distance. What can be a cause of this? Is it
just an adjustment period, since I haven't used Rx glasses before?

Thanks,

Mike

Do you mean the effect goes away after I get used to the glasses and
then I start seeing rectangles properly again? or will it stay the
same but won't bother me much? Do contact lenses have the same effect?
I may consider switching to them if they don't have any of these
problems.

I thought it might be an issue with the lenses and was going to ask
them to be redone. It's too bad if I am stuck with the distorted
vision.

Thanks for the answer!

Mike

On Aug 3, 1:35*pm, "Mike Tyner" <mty...@mindspring.com> wrote:
> "Spintronicus" <spintroni...@gmail.com> wrote
>
> > objects, like TV from a distance. What can be a cause of this? Is it
> > just an adjustment period, since I haven't used Rx glasses before?
>
> It's typical to feel that way for a few days, even more, with your first
> pair.
>
> Lenses that change the focus of light have inevitable side effects leading
> to distortion like this.
>
> Fitting the lenses close to your eye can minimize the effect, so frame
> selection and frame adjustment can help, but only so much. The only other
> way to reduce it is to have the glasses remade less sharp.
>
> Usually it becomes a non-issue when you get used to it.
>
> -MT

Thanks a lot for the answers, but my whole plan was to use the
eyeglasses only occasionally, while driving, watching TV, etc. If my
brain adjusts to the distorted vision with the glasses, would I start
seeing trapezoids when I am not wearing them?

On Aug 3, 5:41*pm, "Mike Tyner" <mty...@mindspring.com> wrote:
> "Spintronicus" <spintroni...@gmail.com> wrote
> .
>
> > Do you mean the effect goes away after I get used to the
> > glasses and then I start seeing rectangles properly again?
>
> Yes.
>
> > or will it stay the same but won't bother me much?
>
> Yes.
>
> Both statements are true to some extent, because your perception of "square"
> is fluid enough that your brain wraps itself around a new perception after a
> few days or a couple of weeks. To accellerate the adaptation, wear them
> full-time at first.
>
> > Do contact lenses have the same effect?
>
> They would, if they were worn the same distance off your eye. The distortion
> is multiplied by the distance between the lens and the eye, which is near
> zero with contacts.
>
> > I may consider switching to them if they don't have any of these
> > problems.
>
> They have their own problems. Wait and see how this goes. If you get
> headaches, or you can't tolerate the effect after 2-3 weeks, take them back
> and ask if the Rx might be too strong.
>
> > I thought it might be an issue with the lenses and was going to ask
> > them to be redone. It's too bad if I am stuck with the distorted
> > vision.
>
> Re-doing with the same Rx and the same frame would change nothing. Adjusting
> the frame so the lenses fit closer to your eyes can make a lot of
> difference.
>
> -MT