I wrote that a few years ago (the site has been up, in one
form or another, for several years...), and have been using
the described method for having both good overall vision
(wide-angle sharp image, with continuous focus ability
from near to far) and ideal still-camera manual-focus
ability, with a remarkably simple method for correcting
the problems of age-related inability to focus over more
than a short range of distances. This method has virtually no
down-sides, yet to my amazement, NO ONE has tried it!!!
Not even people I know locally who have struggled with the
very problems this solution so neatly solves! WEIRD!
I guess people would rather believe the advertising of
the line-less lens sellers, or the somewhat off-bass
solutions offered by optomitrists (tri-focals; bifocals
with inappropriate correction-distances selected;
bi/tri-focal insets that are too large, and placed too high;
line-less lenses with only a narrow angle of horizontal
sharp vision). Try my solution, and you will never go
back (I hated the line-less lens types, since I want to
be able to see sharply over a wide angle, and to have a
fixed FL over enough vertical angle to not have confusing
focus correction with large camera eyepieces...).
The article is at:
http://www.David-Ruether-Photography.com/articles.html#glasses

On Sun, 22 Jul 2001 14:05:32 +1000, "Andrew Gyles"
wrote:

>In revisiting your website I read your description of the glasses
>(spectacles) you use to give you "complete continuously-sharp smooth-focus
>vision from about one foot to infinity..., a sharp view of the camera
>viewfinder and wide-angle vision".
>
>A few months have probably passed since you wrote that. Do you still find
>the "four-distance" design as satisfying as it was at the start, and better
>than "narrow-angle lineless glasses"? (Are the latter the same as
>"steplessly variable focal-length glasses"?)
>
>I found this article very interesting. I'm glad your site is back up.
>Andrew Gyles

>"Neuman - Ruether" wrote in message
>news:3b5937d7.5545176@newsstand.cit.cornell.edu...
>>
>> www.David-Ruether-Photography.com/camcorder-comparison.htm
>> is running again, after a server failure that put
>> it down for a few days. The hit-counters reset,
>> but otherwise it appears OK. On it are (critical...)
>> reviews of several Mini-DV camcorders, with frame-grabs
>> and comments on motion-video picture and on sound
>> characteristics.
>> David Ruether