> -----Original Message-----
> From: Howard Winter [SMTP:HDRW@H2ORG.DEMON.CO.UK]
> Sent: Tuesday, September 23, 2003 11:15 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [OT:] UV LED danger?
>
> Michael,
>
> On Tue, 23 Sep 2003 10:15:04 +0100, Michael Rigby-Jones wrote:
>
> >...<
>
> > I've had arc eye from welding and you certainly know about it.  I would
> say
> > "irritated and sandy feeling" is an huge understatement, it felt like
> > someone was grit blasting the back of my eyeballs and I had to go to the
> > local eye hospital to get my eyes anesthetised in the middle of the
> night.
>
> It's basically sunburn of the retina, so it can vary in severity,
> obviously.  I had a low-level, slow
> exposure, and as soon as I felt the problem developing I left the room and
> didn't go back in - I recognised it
> for what it was, others may not have realised.  I understand that the
> levels of UV from an arc-welder can be
> high enough that a single "flash" can cause the problem.  I've never heard
> of it being as bad as you describe
> - I'm just glad it wasn't me!
>
> > Needless to say I am somewhat more carefull when welding these days.
>
> Indeed!  I hope it had no long-term effects.  I've never been any good at
> it anyway - a friend describes my
> attempts as "Teflon welding"  :-)
>
Dosen't appear to have. I was short sighted before the incident and I wera
contact lenses so I have my eyes tested twice a year and there has been no
change in the last 12 years or so.  I was MIG welding, trying to tack some
bits of metal together and didn't have enough hands to hold everything so I
was using a "point and squirt" technique, shutting my eyes (obviously too
late) while actualy welding.  My eye lids were quite sunburnt as well.  The
foolishness of youth :o)

Mike




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