On Tuesday, 26 April 2016 18:27:43 UTC+1, Mr Macaw wrote:
On Tue, 26 Apr 2016 16:50:33 +0100, whisky-dave wrote:

On Tuesday, 26 April 2016 14:37:46 UTC+1, Mr Macaw wrote:
On Tue, 26 Apr 2016 12:03:27 +0100, whisky-dave wrote:

On Monday, 25 April 2016 19:57:14 UTC+1, Mr Macaw wrote:
http://www.huffingtonpost.com/2013/1...n_4097761.html

"cats have a visual field that spans a whopping 200 degrees, as compared to 180 degrees in humans"

It also depends on teh individual women tend to have a wider filed of vision than men have. I believe this helps them nags us from any direct.

Are you sure that isn't a myth like them being able to see more colours?

they can it's not a myth anymore than it's more common for men to be colour blind.
This all goes back to our early ancestors in men they had to be quick to hunt women has to recognise cours for differmnt type of fruit and veg.
WHich is also why generally omen are bettere at picking out curtains and scattter cushions while the men are hunting pints.

No it's not all women, just some.

In general women see more colours or rather have a beter perception of shades.

And I don't see how four cones helps anyway.

What you 'see' doesn't matter.
Facts will out-weigh what you see or think.

from yuor link below.
"study suggests that as many as 50% of women and 8% of men may have four photopigments and corresponding increased chromatic discrimination"



What's the point in having one inbetween two others? You can sense any colour between those two receptors by the brain analysing the strength of the signal from each receptor. Which is why we don't see three colours, but an infinite number.

we don;t see any infinite number.


https://en.wikipedia.org/wiki/Tetrachromacy

"In humans, two cone cell pigment genes are present on the X chromosome: the classical type 2 opsin genes OPN1MW and OPN1MW2. It has been suggested that humans with two X chromosomes could possess multiple cone cell pigments, perhaps born as full tetrachromats who have four simultaneously functioning kinds of cone cells, each type with a specific pattern of responsiveness to different wavelengths of light in the range of the visible spectrum.[16] One study suggested that 2-3% of the world's women might have the type of fourth cone whose sensitivity peak is between the standard red and green cones, giving, theoretically, a significant increase in color differentiation.[17] Another study suggests that as many as 50% of women and 8% of men may have four photopigments and corresponding increased chromatic discrimination compared to trichromats.[16] In 2010, after 20 years of study of women with four types of cones (non-functional tetrachromats), neuroscientist Dr.. Gabriele Jordan
identified a woman (subject cDa29) who could detect a greater variety of colors than trichromats could, corresponding with a functional tetrachromat (or true tetrachromat).[18][19] Apes, Old World monkeys, and Humans normally have three types of cone cells and are therefore trichromats. However, at low light intensities, the rod cells may contribute to color vision, giving a small region of tetrachromacy in the color space;[20] human rod cells' sensitivity is greatest at a blueish-green wavelength."

So .....


It's difficult to test yourself, have you ever tried tickling yourself ?.

Those are not comparable.

But similar ideas.

What makes you think you can't test yourself? You know the way you're looking, and you know where the thing is you're trying to see.

yes that's the problem yuo are aware that something will become visible out of the corner of you eye and that is the problem.


Tickling, **** knows, that doesn't make sense.

you mean it doesn't to you.



Cats are better at seeing changes or fast movemnt rather than gradual changes which they dont normally worry about.

That cat always worries about me.

So is used to you.

And should have run away as I approached.

Why ?

Even if it wasn't scared of me, it should have noticed I was reaching over to stroke him, and not jump out of his skin when I touched him.

Why did he jump out of his skin. Think about this.

Now this is why you can't test yourself.
If the cat would have been testing himself he would have known when he was going to stroke himself wouldn;t he but he didn;t know when you were going to stroke him see how simple this is.


Secondly, I always find my cats looking straight at me or whatever they want to examine,

same for most creatures, as the cnetre of the eye is usually the the best for general viewing.

Yes, but you don't stare directly at a person for more than a second or two. It doesn't take long to gather the details you need.

So cats don;t like diorect eye contact for very long as in teh animal kingdon it's a threat, but in humans it doesn;t work like that, cats reaslise this.

They must then also realise it's considered annoying.

How do you know they have that sort or perceprion and why would they get annoyed.


Have you ever noticed that some bulbs flicker out of the corner of your eye but not when you look directly at them.

All LED car tail-lights flicker out of the corner of your eye, and half of them when you're looking straight at them. Hard to believe in the 21st century we get such ****ty lights (and on decent cars).

Are you sure it's not just you.

Nope, google for it and find thousands of people complaining about it.

Link ?
They are copmplaining about brightness not flickering.



they don't seem to be able to see sideways, and the other day I walked over to one cat, I was 90 degrees from his forward direction, and he didn't see me until I touched him to stroke him, which scared the hell out of him.

Maybe he was day dreaming.

He was licking his leg.

So explains it.
How can you can an accurate ID of the angle of a cats vision while it;s washing it's leg.

Can it not observe something approaching it while it's washing? So you not notice someone walking towards you when you're washing the dishes?

I don't move my head backwards forward and sideways or up and down while doing the dishes.