I can find lots of web sites that tell me what 20/20,
20/60, 20/100 etc. mean.
I also find lots of sites that explain diopters (d = 1/f)
But how do I relate the two?

Now we have more interesting news from our correspondant.
This afternoon she tested her vision for the big Snellen chart indoors
and she read 3/40.
Then she practised as follows:

I just can't figure out which of you does more damage to this newsgroup;
the absurd zealots Otis, Rishi/Evaristo or those of you who reply to
their nonsense.
Are you having fun?  If you are, you do so at the expense of those who

Is there an easy way to tell between pseudomyopia and true myopia?
Could someone suffering from pseudomyopia develop true myopia upon wearing
lenses?

Now this is something.
A friend who was famous for his incredibly perfect sight was suffering
two months ago of a mild conjunctivitis in one eye.
She has a wife who is very nearsighted and had to renounce the use of

My 2.5 year old (bifocal) metal frames broke the other day. It
was time for an exam anyway, so I got one and my prescription
had changed slightly. The optometrist place said the frames
were unfixable and they could not order that model anymore but

My Rx is R -5.75 -1.00 88
               L -6.50 -0.75 90
Bifocal add +2.00
I've always used basic plastic lenses in the past.  Just got new eyeglasses

I had a new pair of glasses done 3 years ago in canada.. my
perscription is very high.. about -11.0 and i had it done with an the
1.74 index with very small frames (think John Lennon).. I was planning
to keep these glasses for the long haul, but alas theres a bunch of

Dear Friends,
Mike (on his own) determined to quit the minus lens
cold-turkey at Easter.  (His decision -- not mine.)
He researched "Bates" and many other issues.

I have just added 5D of base out prism to my current rx of +2.5 with +3.25 progressive. I am 48 year old and have no problems wearing this combination for the last 3 months but i have heard that long term wearing of prism may cause damage.  Is there any truth in what i have been ...

Please, note that Perfect Sight has nothing to do with PLUS LENSES or
any other type of lenses usage.
The theory which our friend Otis - an old man who wears thick glasses
and does not comprehend at all what normal vision is - so strongly

Now I am talking with a lady, 60 years old, who knew nothing about
Bates treatments, and once I discovered that she wore contacts for
myopic condiitons, I asked her to trash them, a thing she did quickly.
Then she reported to me that in summer at seaside, without glasses, she

A little background:  I am near-sighted with a pretty bad case of
astigmatism.  I've been wearing corrective lenses since I was 6 years
old.  I am 32 now.  I see my eye doctor every 12-15 months.  My problem
is that for some time now (a few years at least), I've had problems

What malfunctions in the eye that causes  one to see double for
instance seeing two people walking where there is really only  one.

I have mismatched eyes nowadays and see mostly with one eye (R) for
distance then switching to the L for closeup. I don't seem to have a
dominant eye anymore. The swap is imperceptible by me. Things are in focus
at two points, using either eye. Naturally my 3D perception is limited.