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This reminds me of a good story:

Many years ago an old dive buddy of mine (and deep air advocate) told me
about his attempt to dive the Liberty Ship in Miami on deep air--solo.  =
The
ship lies in 372FT.  He said that he got to about 320 and he could see =
the
deck of the ship, but that he started seeing dots and had had tunnel =
vision.


At that point he knew he was in trouble so he told me he "closed his =
eyes
and hung on to his power inflator with both hands."  He came to at about
120FT on the way back up, stabilized his ascent, relocated the anchor =
line
and after some decompression stops got out of the water in good shape.  =
He
told me that he "learned his lesson" and would never again dive past =
300FT
on air :).  To the amazement of us all, old age killed him before deep =
air
did. =20

Anyway, is this "blue dots in a narrowed field of vision" actually O2
toxicity?  Until I read your post I had not heard anyone else describe a
similar phenomenon. =20

 - Jody

-----Original Message-----
From: Joe [mailto:joe@po*.co*]=20
Sent: Wednesday, September 11, 2002 3:17 PM
To: George Irvine; Techdiver@Aquanaut.Com
Subject: Re: O2 exposure

This guy will never get it.  I just hope that the people in VB will =
realize
how sorely inadequate his knowledge of diving is.  In one post he =
embraced
every piece of misinformation about O2 toxicity ever put out. =
Reminiscent of
when the deep air aficionados used to say that if you started to see =
"blue
dots" in a "narrowed" field of vision it was time to begin your ascent
because you were about to tox.  I just hope for his sake and everyone =
around
him that he can get past the hubris and learn to recognize good =
information
when he sees it.


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