On 23 December 2011 22:22, Andrew Burton <aliensrcooluk at yahoo.co.uk> wrote:
----- Original Message -----
From: "Dave Caroline" <dave.thearchivist at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, December 23, 2011 1:57 PM
Subject: Re: OT: Colours, perception of (was Re: rl02 disks for cheap on
ebay)
A higher percentage of males have colour sight
deficiencies than
female. better not argue :).
No arguing here :)
I wear glasses (and so did a mate at school), but I can't think of any women
I know (or have known) that wear glasses.
What? Really? Seriously?
I find that an /amazing/ comment.
Firstly, because glasses cannot help with colour blindness.
Secondly, because the entirely separate disorders of myopia
(short-sightedness), presbyopia (long-sightedness) and astigmatism
affect both genders equally and many many women suffer from them. I
know loads of spectacle-wearing women; if you do not, I can only
assume that you don't know many women.
Of course, prevailing standards of physical appearance mean that many
women wear contact lenses rather than spectacles, or even submit to
radial keratotomy ("laser eye surgery") to avoid the "stigma" of
wearing specs. "Men don't make passes at girls who wear glasses," and
crap like that.
Thirdly, colour blindness is mainly a disorder of men. Traditional
red/green colour blindness is a sex-linked condition, meaning that it
involves genes on the sex chromosomes. Males have XY, females XX.
Males are missing one arm of one chromosome. That means that a
defective gene on the other chromosome can not be "balanced out" by a
good one, so males are far more likely to be affected.
This does not apply to different visual disorders such as achromatopsia.
--
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