P3D Re: Pulfrich Effect

[boris@xxxxxxxxxxxx (Boris Starosta)]

A number of list members have mentioned 3-d effects upon first wearing new
prescription glasses.  I've been meaning to post about this as well...

I just got my first set of glasses a few months ago.  Looking through them,
I perceive the illusion of depth along bright color gradients.  For
example, my CD software has this make-believe red LED display, and as seen
through the glasses, the LEDs appear substantially farther away (sunken
into the display) than the remainder of the display.  The LEDs are shown on
a black field.  Same goes for the red LEDs on my otherwise black modem.
Strange effect.  I detect no other chromatic aberration in the field of
view.

A propos the glasses.  I dislike wearing them, because I think they are
ruining my eyesight!  I got them, despite the fact that I still have
(marginally) 20/20 vision, because I thought it would make my rather long
stints in front of the computer a little less tiring (I am farsighted).  I
was reluctant to get them, because I thought they might accelerate the
decay of my vision (i.e. the muscles controling the lenses of my eyes would
be weakened).  Nevertheless, I thought I would give them a try.

Well, what I feared has indeed occurred, at an alarming rate!  At first I
would wear them for only an hour or so, because my vision is indeed much
improved, and I like to see all the details I have apparently been missing
recently.  Upon removing the glasses, it would then take an hour or so for
my eyesight to return to "normal."

Then I tried wearing the glasses for a whole day - enjoying all the
textures that I've been missing in the world.  After that day, I swear it
took nearly a week for my eyes to get back to "normal."  What I mean is,
that after wearing the glasses, my eyesight is _significantly_ degraded for
the time periods described.  To the point where I feel I can't function
without the glasses at all.  Needless to say, this is very disconcerting
and disappointing to me, as I've always had very good vision - with the
exception of the slight degradation in recent years.

(I had first gone to my opthalmologist about four years ago, complaining
about a slight blurriness in my right eye.  He examined me, and expressed
surprise that I had noticed it, the astigmatism was so slight.  Then this
year, although I still tested 20/20 out of my left eye, he suggested that I
try glasses.  Also because I really liked the improved view through his
sample corrective optics.)

I would appreciate any comments (off-list, if necessary) from others who
have made similar experiences.

Boris


>Paul Kline wrote:
>
>>Last week I received my first pair of "lineless" bifocals.  After a
...
>>noticed a lot of Pulfrich effect while watching tv, so I assume that



Boris Starosta            boris@xxxxxxxxxxxx
                          http://www.starosta.com
usa 804 979 3930          http://www.starosta.com/3dshowcase



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End of PHOTO-3D Digest 3100
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