Cats have excellent night vision and can function at only one-sixth the light level required for human vision. This is partly the result of cat eyes having a tapetum lucidum, which reflects any light that passes through the retina back into the eye, thereby increasing the eye’s sensitivity to dim light. Another adaptation to dim light is the large pupils of cats’ eyes. Unlike some big cats, such as tigers, domestic cats have slit pupils. These slit pupils can focus bright light without chromatic aberration, and are needed since the domestic cat’s pupils are much larger, relative to their eyes, than the pupils of the big cats. Indeed, at low light levels a cat’s pupils will expand to cover most of the exposed surface of its eyes. However, domestic cats have rather poor color vision and can only see two colors: blue and green, and are less able to distinguish between red and green, although they can achieve this in some conditions.

I opened up the photos
I look about to see
what beauty awaits me
across the land and sea

this morning i just did that
it was a sight to see
I found something to smile about
it was a funny as can be

four adventurous little ’snow cats’
all lined up in a row
sunning on that winter hillside
in all that icy snow

they are so very clever
those ’snow cats’, in that row
those ’snow cats’ make me smile
sunning in the snow

they make you think they have it made
to me that is the show!
to see those silly “snow cats”
all lined up in row

now my poem is ending
I just want you all to know
how much fun to see the snow cats
in all that ice and snow!