Dear Morgan,

When I talk to a person -- then I must TRUST that
he makes the measurement correctly.

That is why I insisted that you read at 20 feet (the
official distance), and verify that the 20/60 letter
was 1 inch high.

As long as YOU PERSONALLY check this, and can see
YOUR CLEARING on that Snellen -- then you are doing
it the "right way".

I think you are now reading your Snellen correctly -- and
that would be my point.

Vision clearing (while slow) will be confirmed
by you.

Some more commendary:

--- In Myopiafree2@yahoogroups.com, Mogzieno1@... wrote:
>
> Dear Otis,
> I have been reading messages in the groups. I read
the Nbab
> (or something similar) post. He says he has 20/40 but then he
states he
> measured this from 9 feet using a yard stick?

Otis> Yes, I think he said something like that. But
I have always SUGGESTED that the measurement be
made at 20/20 feet, with 20/60 verified at 1 inch.
If a person does not follow this recommendation,
then I can't do, or say much about it.


>
> Surely this means he has a greater prescription than he has stated
from 20
> feet?

Otis> I WISH he had checked at 20 feet. SOME charts (IVAC)
AUTOMATICALLY change the letter size, to account for
the measurement made at 9 or 10 feet. Thus the 20/60 letter
would be 1/2 inch high at 10 feet. If that is the
case, then 20/40 is correct for him. But I must
trust his competence to understand that issue.

Something in the area of 20/80 (double the distance double the
second
> number)

Otis> That is correct, however, a 10 foor chart, will
have a 20/60 at 1/2 inch high.

Otis> Because of this "confusion" I strongly recommend
that you make your measurements at 20 feet, and
verify that the 20/60 letter is 1 inch high.
To do it any other way invites total confusion.

Otis> I think Nbab did it correcly and understood
this issue.

Otis> But neither you or eye can check this.

Otis> But you can check your own Snellen and
trust the results.

Best,

Otis



>
>
> Thanks
>
> Morgan
>
>
> [Non-text portions of this message have been removed]
>