Do you believe that people's vision is seven times sharper than cats? Scientists mapped 600 species of animal vision.

Scientists have mapped the vision of nearly 600 animals, showing how they differ from the world we see. In a recent paper published in the journal Trends in Ecology and Evolution, the
, researchers estimated the visual sensitivity of hundreds of species based on the anatomy of animal eyes.
recently published in Trends in Ecology and Evolution In a paper in the journal Evolution, researchers estimated the visual sensitivity of hundreds of species based on the anatomy of the animal's eyes.
Although humans are not the most powerful in some aspects of vision, our vision is still seven times sharper than that of cats, dozens of times stronger than mice or goldfish, and hundreds of times more accurate than mosquitoes.
Although humans are not the most powerful in some aspects of vision, our vision is still seven times sharper than that of cats, dozens of times stronger than mice or goldfish, and hundreds of times more accurate than mosquitoes.
most vertebrates, including humans, have two types of visual cells in the retina, called pole cells and cone cells.
most vertebrates, including humans, have two types of visual cells in the retina, called pole cells and cone cells.
Sina Science and Technology News, June 4 (Xinhua) -- Scientists have mapped the visual images of nearly 600 animals, showing how they differ from the world we see.
Although humans are not the most powerful in some aspects of vision, our vision is still seven times sharper than that of cats, dozens of times stronger than mice or goldfish, and hundreds of times more accurate than mosquitoes.
this fascinating study shows the wonderful scenes seen by the eyes of different species. In a recent paper published in the journal Trends in Ecology and Evolution, the
, researchers estimated the visual sensitivity of hundreds of species based on the anatomy of animal eyes. Eleanor Caves, a postdoctoral researcher at Duke University who
, says most species "see the world a lot less finely than we do" compared to humans.
researchers measured the number of cycles per degree in each species' field of vision, the number of black and white pairs that the species could identify in the range before the vision blurred.
study says the human eye can distinguish about 60 cycles per degree.
by comparison, some birds of prey can be able to distinguish up to 140 cycles per degree.
this allows eagles and other carnivorous birds to find small prey on the ground from a height of several kilometers. many other birds
see fewer than 30 cycles per degree, as do fish.
"the highest sensitivity in fish is half ours," Keeves said.
we can use pictures to recreate the world seen in the eyes of animals, showing the huge visual differences between different species.
researchers made the images using AcuityView software.
the software can take a digital picture and then remove some spatial details based on the animal's vision.
in humans, people who see less than 10 weeks of vision per degree are considered legally blind, compared with one week per degree for most insects.
suggested that the butterfly's wing pattern, in addition to its role as a deterrent to predators, could also be a way to attract potential mates.
however, studies have shown that this may not be accurate.
Keeves says she doesn't think butterflies can see patterns on their wings.
the researchers explain that the images obtained in the study represent only the visual sensitivity of animals, and that when the brain processes visual information, there are other factors that play a role. "The point
is that researchers who study animal interactions shouldn't assume that different species have the same detail perception as we do," Keeves said.
what are rod cells and cone cells? Most vertebrates, including humans, have two types of visual cells in the retina, called pole cells and cone cells.
cone cells allow us to see the color, but at the same time require a lot of light, so it stops working in dark light.
in dark environments, the rod cells allow us to still see things, but only black and white.
signals from cone cells are passed on to the brain and translated into color-aware information.
some people can't distinguish between certain colors, a phenomenon known as color blindness.
color-blind patients have a lack of specific cone cells in the retina, or a lack of capacity for certain cone cells.
about 8% of men and 0.5% of women in the total population are color blind.
Source: Sina Technology.