Re: New glasses

On or about Tue, 30 Oct 2007 12:38:10 GMT did "Christina via
MedKB.com" <u36039@uwe> dribble thusly:

6 months ago I got new glasses
Right eye -3 -0.25 x 140
Left eye -2 (only)

Now I find that the only way my eyes feel truly relaxed is when I am wearing
my glasses.
Why is this?
Many thanks

The fact that one eye is blurrier than the other is certainly a
factor.

Another contributor, however, is the secondary consequence of wearing
negative lenses - minification (i.e. the opposite of magnification).

Your right eye has objects reduced in size around one third more than
in your left eye (things in your right eye look around 9% smaller,
while things in your left eye about 6% smaller - exact figures would
depend on how far from your eyes the lenses are). This is something
that you brain has to get used to when you're wearing glasses. When
you take your glasses off, things, though blurry, look the same size
again in each eye. That also takes getting used to. If you left your
glasses off for a long time, you'd eventually get used to the
difference in focus and lack of a difference in image scale. Once you
put your glasses back on, you'd have to get used to the image scale
difference again (it'd probably take little to no time to get used to
the fact that both eyes are again in focus).

My eyes are the same, but I have to get used to the image scale
difference every time I switch between contacts (which, since the gap
between them and the eye approaches zero, have a minification also
approaching zero) and glasses.
--
- Mike

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

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