Enhanced Visual Spectrum.

[Andy Finney <andy@xxxxxxxxxxxxxxxx>]

Dan wrote:

Is it possible that something similar can occur with vision whereby the
wavelengths perceived by a person with exceptional eyesight extend beyond
visible red into Near Infrared radiation?


Years ago, my eyesight was thoroughly tested by a PhD optics major at
Imperial College.  I have slight colour deficiency ... as did a
surprisingly high proportion of the engineering students.  Well, if I
remember rightly, when my spectral sensitivity was tested, this guy found
that I have a slight 'peak' in the near infra-red ... in other words I can
apparently see a bit of near IR radiation.

Having said that, I have never actually 'seen' any evidence of this myself.

Sadly, my hearing kissed goodbye to 15 KHz a long time ago :=( but both US
and European TVs (PAL and NTSC) have horizontal frequencies that are very
very similar and around 15.625 KHz  ... sorry but I can never remember the
exact numbers.  In fact PAL and NTSC TVs will usually display each others
pictures although the picture height will be wrong and the image will be
monochrome.

I'd give the carrots/RADAR story but I see that Clive has already done that.

Andy


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