Re: new glasses adjustment period

On or about Wed, 31 Oct 2007 18:26:31 -0000 did Avalon1178
<Avalon1178@xxxxxxxxx> dribble thusly:

Hi,

I recently got new glasses (basically new frames, but same
prescription) after wearing my old ones for 3 years. Anyway, I know
there's always an adjustment period, but I've never experienced like
this one before (or maybe its been a while so I don't remember). The
experience I"m getting is that the ground look closer than they
normally appear, but the biggest nuisance is that objects that ought
to be square look like "trapezoids" (the sides are slanted inward).
This is annoying since I work on the computer a lot and my flat screen
looks like a trapezoid (not pronounced trapezoid, but I can tell the
difference) and the sides of the document are slanted inward. Does
anyone know if this is normal? I called my optometrist and they
suggested to wait a couple of days for my eyes to adjust and if it
still happens again to come visit them. But I'm not sure if I'm just
being paranoid or being overly concerned. Has anyone experienced
this? Thanks.

There are a number of distortions introduced by glasses. What you
describe as a trapezoid sounds actually like pincushion distortion
(the reverse is barrel distortion). Another effect is minification,
where objects look smaller than they actually are.

When your prescription changes, the nature of these distortions
change, and it takes getting used to.

Without knowing the old and new prescriptions, however, one can only
speculate precisely what differences you should expect.
--
- Mike

Ignore the Python in me to send e-mail.
.

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