Some folks are particularly sensitive to these things. I know a
guy who goes nuts around a computer or TV because the noise of
the ummm... flyback? whatever it's called. Drove him crazy.
No one else could hear it. Just like some folks are more sensitive
to the flicker of TVs and monitors - they _need_ to have 72Hz or
whatever even though many of us don't notice flicker at 60Hz
I know another person who finds fluorescent lights too blue. He
had cataract surgery and the result of removing the yellowed
cornea was to increase the amount of blue light hitting his
We might be created equal, but we don't end up equal.
15,570 kHz for standard TV ... that's the horizontal sweep rate ... can go
higher for the various high color modes (vga, svga, etc).
Cornea blocks UV light ... flourescent light is a UV light with UV to
visible phosphor coating inside glass ... but some UV does escape. Research
will show that during WWII, senior citizens had their corneas removed so
they could then watch for UV light comms between enemy vessels off the US
As you age, the yellowing of the cornea increases the UV
blockage and increases the filtering of the blue end of the
spectrum as well. An astronomy enthusiast I know had his
cornea removed for cataracts and raved over the new hues of
blue and violet he could see.
The lens removal and subsequent ability to see blue isn't surprising.
Apparently people in bright equatorial areas have had enough UV exposure
that they do not see the color blue very well. Some languages from these
regions supposedly do not even have a word for "blue".
*BELIEVE* it. Today, there are artificial replacement lenses available.
Historically after the surgury, one wore glasses with *very* thick lenses.
Years ago, I worked in an opthalmic lens laboratory. We had a separate
machine for griding 'cataract' lenses -- for glasses, not implantable.
I think it was powered up _twice_ in the 18+ months I worked there.
Robert, I'll never forget the time I saw an old-timer Navy man in
Olathe, Kansas, at the Naval Air Station, circa 1964, sporting what
could have passed for Coke bottle bottoms. He said he had cataracts.
The glasses were dark green. Is there a reason they were green instead
of gray, other than HIM having asked for that color? I presume it was
due to light sensitivity, but you don't often see green sunglasses.
Robert Bonomi wrote:
jeez, Keith, why are you taking exception to my innocuous comment?
You are inferring bad thoughts from me again, probably due to the loss
of your fragile sense of humor.
BTW, you revealed your age yesterday. You surprised me. I thought you
would be older. Your level of crankiness usually takes a bit longer to
SMILE, KEITH! I promise it won't kill you.
Sorry you aren't any list of mine. I just enjoy a bit of repartee.
(When it's in good fun).
TGD? (that one flew right over...)
Unisaw A100 wrote:
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