On Wed, 3 Feb 2010 17:42:23 -0800 (PST), John Dennis
wrote:

On Feb 3, 5:56*am, "Yokel" wrote:
"DW downunder" noname wrote in message

u...
|
...
|I understand the incidence of colour vision impairment is around 25% of
males
|and a low % of females, maybe 13% of the total population. Likewise, it's
|amazing how many maps are hard to read for this 13%, how many documents use
|nice red script over a beautiful verdant green tree background - even our
|local RAC has managed that one.
|

Is it as high as that? *That means you would expect two or three people in
each cricket team to be affected, but in all the time I have been at Cadnam
(over 30 years) only one person told me that they had a problem. *Trying to
pick a red cricket ball off a green pitch when both appear to be the same
colour (as I understand it, very few people see in black and white, most
colour-blind people see fewer different colours than the rest of us) must be
a challenge. *I have enough trouble and my colour vision is good (it was
tested when I joined the railway). *Perhaps many people either learn how to
deal with it (a normal red ball is a significantly darker shade than the
pitch, unless the grass has been left very lush) or they take up sports
other than cricket.

I'm red-green colour blind, and played cricket without any issues for
40 years. Seeing the red ball *moving* is easy. What was a challenge
sometimes was at practice, when fetching a ball hit into the outfield.
Once it stopped, if I took my eyes off it for any reason (often a call
from somebody else to field their ball) then I had difficulty finding
the ball.

I cannot readily see red flowers against green leaves (the poppies in
Belgium being a prime example, or the typical Australian flowering
gum) without stopping, perhaps having them pointed out to me, at which
stage, knowing what they look to my eye, I can see them easily enough
afterwards. Until next time...

Can't get a job involving safe-working on any railway - not even a
tourist (preserved) line.


I suffer from blue-green colour blindness. It is usually called
"blue-yellow", however that term is highly misleading because no-one
with the condition has much difficulty distinguishing between blue and
yellow.

There are no safety implications, thank goodness, and at work I am
able to avoid situations where it might become a problem.