0
A YouTube search demonstrates that humans can indeed have some level of independent control of their eyes. It is not even as exotic as it sounds. Many people have the ability to willfully "cross their eyes", or move their eyes inward toward each other, and it is only a short extension of this ability to hold one eye focused on a stationary object while the other crosses it. On the other side, MagicEye posters are viewable by willfully moving the eyes outward. Both effects are readily learnable, and practice brings the additional range and speed you would expect.
So much for horizonal independence. What about vertical independence? Truly independent motion should obviously have both. Now, the horizonal separation of the eyes in the skull (this discussion fixes the coordinate system to the orientation of the skull) produces the need for our eyes to regularly adjust horizontally with respect to each other to maintain focused binnocular vision on objects of varying distance from them, but this not the case with the vertical motion of the eyes, and so there are consequently fewer opportunities to learn vertical independent motion of the eyes.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
How is the cow eye and the human eye different?
A cows eye is relatively larger than a humans eye. It is also oval shaped rather than circular. Humans eyes are much more flexible than cows eyes. There are also similarities, such as, both humans and cows have a tough fibrous outer layer called the sclera. We also have an optic nerve sending messages from our retina to our brain just like cows. The cow eye has four muscles that enable it to move up, down left and right, whereas our human eyes, have 6 muscles which means we are able to move our eyes more freely. This is why cows move their heads, where as humans move their eyes. Another major different is the Tapetum, this tapetum is located just behind, or sometimes within the tapetum. Have you noticed cows eyes at night 'glowing?'. This is because the light is being reflected back onto the retina! In summary: The cows eye and human eye are quite similar. The 3 biggest differences are the shape and size, and tapetum.
Why are human eyes positioned at the front of the head and not the side?
Answer .i dnt knw that's why i am asking The biggest reason is that humans and animals that have eyes positioned at the front instead of the sides like a bird is so the human or mammal that are predators can judge distance and keep focus on the prey that is right in front of it. Of course humans sit down for meals at a table for the most part now a days unless your from the woods of Kentucky-lol-lol...In retrospect lets take a deer, eyes are on the side. A deer is not a carnavore, they eat grass, they don't need to hunt for prey so there eyes are outward to see more grass. They have no need to focus in on or kill prey in front of them, i kind of hope this helps...You can always spot a potential dangerous animal if you don't know what it is and its approaching you ....if the animals eyes are directly in the front of the head just like ours or a dogs or a cats
What does Eyes be so low from that chiefin' mean?
Well chiefin means smokin So it means that his eyes are tired from smoking all day
Do very dark blue eyes exist?
Yes, I have them!
How many times per year does the eye blinks?
I timed Miss Kitty for a minute and she didn't blink once. NOT ONCE!
Why do humans have eyes?
So they can see things.
What are special about crab eyes?
The crayfish's eyes can move and most of the time , it is to protect the eyes so it moves into a "case".
Are dogs living organisms?
Well, let's examine the evidence. Do they move independently? Do they reproduce? Do they obtain energy from their environment? Yes, so they are alive.
Do owls have eyes on the side of their head?
No they only have 2 eyes. They can move their heads all the way around so...yah.
Do all living things have eyes?
No. For example Plants don't have eyes and they live.
Is it possible for a chimp to have blue or green eyes?
I do not believe so, they have brown eyes. Altough I am not exactly sure. Chimps are very like humans so It might be possible. :o
How do the eyes move?
our eyes are attracted to the object so it follows it. example: have you ever stared at something while riding in a car and stared at it and couldn't keep your eyes off of it?
Do the eyes move?
our eyes are attracted to the object so it follows it. example: have you ever stared at something while riding in a car and stared at it and couldn't keep your eyes off of it?
Why is it that animals move from place to place with the reasons why humans today may move from place to place?
because all animals move almost every day and humans can move anytime they want so you can real make a choice when ever you need and when ever you want both animals and humans can do that every single day
Do humans move faster than mice?
kind of because mouses are small so humans are a little faster than mice
How big are owls eyes?
They are very large. In fact, they take up so much of the owl's skull that there is no room for the muscles (such as human beings have) to move the eyes around. This is why an owl is able to swivel its head around to such a great extent (almost 180 degrees) On average, owls can rotate their heads 270 degrees. If humans had eyes in proportion to an owls, our eyes would be the size of saucers. NF
Why are humans paranoid in the darkness?
beacuse our eyes cannot see so our nervs panic which gives phobias
