What Do Cats See?
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What Do Cats See?
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Re: What Do Cats See?
#2[deleted]
Re: What Do Cats See?
#3[deleted]
It's true. Most animals with good night vision have blurry day vision.
One way you test it is by having one card with stripes and another card that is grey, each over a different button, and training the animal to press the button with the striped card to get a reward.
Then you just keep making the stripes narrower and narrower, until it can't tell the difference between the grey card and the stripes, and starts guessing.
Re: What Do Cats See?
#4if I understand correctly they are short sighted so a good picture to add would be a macrophotography with a background to see where is their best vision in terms of depth of field no ?
Re: What Do Cats See?
#5The trouble with "simulations" like these is they ignore cognitive post-processing - much like visualizations of what it's like to look through a compound eye portraying it as like looking at a wall of TV sets.
The human images and the cat images are not comparable because the human images represent a subjective impression, rather than a prediction from visual capabilities like the cat images. For example, the human images are crisp right out to near the edges. This is simply inaccurate - you can only read text within a FOV of about 6 degrees.
Re: What Do Cats See?
#6I think this misses one of the keys aspects of cat vision, movement perception. You'd need video for that. I imagine they see something like a glowing trail around moving stuff. Depeding on light conditions my cat might ignore food/toy until it moves.
Re: What Do Cats See?
#7[deleted]
Re: What Do Cats See?
#8I think this misses one of the keys aspects of cat vision, movement perception. You'd need video for that. I imagine they see something like a glowing trail around moving stuff. Depeding on light conditions my cat might ignore food/toy until it moves.
I often have to shake my cat's biscuits before she'll eat them, even if she has just been eating them.
Re: What Do Cats See?
#9I think this misses one of the keys aspects of cat vision, movement perception. You'd need video for that. I imagine they see something like a glowing trail around moving stuff. Depeding on light conditions my cat might ignore food/toy until it moves.
For the video simulations you're suggesting, they would have to slow everything down for us to see the difference, which would kind of break the realism they showed until then.
Also, the glowing trail thing would be a great way only for creatures like us humans, with slowly refreshing visual brains to handle information coming from faster refreshing retinas. But I have to imagine cats have their brains appropriately tuned for the refresh rate if their retinas and see movements clearly, with great detail in the time dimension.
Re: What Do Cats See?
#10I think this misses one of the keys aspects of cat vision, movement perception. You'd need video for that. I imagine they see something like a glowing trail around moving stuff. Depeding on light conditions my cat might ignore food/toy until it moves.
The photos miss that, but it is mentioned in the text:
The increase in rods also enhances their “refresh rate”, so that they can pick up movements much faster (very helpful when dealing with small animals that change direction very quickly during a chase)
Also: Interestingly, this also means that humans have the ability to see very slowly moving objects at speeds 10 times slower than cats (that is to say that we can see very slow things move that would not appear to be moving to a cat)
Which made me wonder why sneaking up on a cat chameleon-style doesn't work better.