In an average human lifetime, how many images does the human eye see ?
435358
If we assume the human lifespan to be 80 years and that we are awake 16 horus per day, then this calculates to 1,681,920,000 seconds of wakeful seconds in a lifetime (not counting leap year or other chronological adjustments.) The trick is to calculate the number of images processed per second.\n\nThsi is a bit problematic because the eye doesn't really process one image at a time. Instead, it takes a series of snapshots of the whole picture it sees and breaks it down into a mosaic of images. Therefore, the eye does not see a tiger and a duck and a tree. It sees a big grid og colors and shapes all put together into a pattern. It does this many times per second.\n\nIf we assume that each part of the grid it sees is a different "image", then we can begin guessing. Let's say that the image grid seen by the eye is 1,000 by 1,000 pixels. This makes a million pixels or images. If this grid is refreshed 20 times per secodn, then in a single second, the eye sees 20,000,000 pixle images.\n\nSo, in a lifetime, the eye will see 20 million times the number of seconds of life expectancy (1,681,920,000) for a total of (drum roll):\n\n33,638,400,000,000,000 images!\n\nIn another approach, if you assume that each image is an indivudual "thing" in the world (like a duck or a tiger), then the number of images seen per second drops significantly. My guess is that my eye and brain together can recognize about 10 things in a second. That drops the total number of images viewed in a lifetime to:\n\n16,819,200,000 images.\n\nFun to think about!
264522
The healthy human eye is only restricted by external factors (ie.: poor visibility due to haze, dust or fog), just think how far the stars are!
646082
It means that to see something a 'normal' person can see from twenty feet away...you also have to be only twenty feet away...so your eyesight is 'normal' If you are 20/100 then you have to be twenty feet away to see something a 'normal' person can see from 100 feet away.
404864
Infinite, look at the stars. Through the earth's atmosphere one can only see approx 60 miles on a clear day.
1007479
Yes.  Beyond our own Milky Way galaxy there are estimated to be 200 billion more galaxies in the visible universe at distances up to 13 billion light years from Earth.
647237
The eye of the beholder.
914941
I'm not too sure, but I would assume that it's green (532 nm), which is the most visible color for most humans.
960638
I've never experienced a phenomenon that could not be related to some outside perturbation\n\nAs for the human retina, it has about 125 million rod photoreceptor cells (plus about 6 million cone cells, used mostly at night).  On a surface roughly 1/4th of that of a full format digital SLR today, the retina has about 10x more "pixels", i.e. a density 40x higher (and our own "pixels" don't interfere w eachother, unlike those of cameras ;-)\n\nGiven that from even as low as 10 megapixels is is pretty much impossible to see any on a postcard size print, I'd be very surprised if anyone could identify individual megapixels in the case of our own 125 megapixel camera ;-)\n\nhope this helps\n\na
101353
he University of Illinois Eye Center and other sources say a baby is born with eyes that are about 75% the size they eventually will reach by adulthood. But still other sources, including Prevent Blindness America, say a baby's eye size is about two-thirds the size of an adult eye by the age of six months. Considering how tiny a baby is, this is still a very large eye size.
964013
looking into your eyes
17976
I'd say sight.\n\nI can't imagine what life would be like if I can't see...\nOf course, the other senses are important too. If we lose even one of them... I don't even wanna think about it.\n\nBut it's inevitable.
1087151
from a biophysical standpoint, the rods and cones in normal human retina work the same way, based from our common genetic blueprint, so I'd say it's extremely unlikely.  Colors that coordinate do so because of how the wavelengths correlate, just like the wave functions of accoustic waves in a musical cord correspond mathematically.  So I don't think color perception is quite so arbitrary that one person's "blue" is another person's "orange."  Blue is light with a wavelength of 420-490nm, and orange registers at 585-620nm- it's a very absolute thing.  I think the mental image that human sensory organs produce in the visual cortex resulting from the perception of these colors would be identical, again just based on the rigidity of critical organ structuring in human genetics.
1104938
there are roughly 100 billion neurons in an average adult human brain.  estimates of synaptic connections between these neurons is estimated to be on the order of 100 trillion.  although these are not analagous to bits or bytes, if they were, the capacity would be on the order of 100 terabytes.
449566
The Brain is the least understood part of human anatomy.  Considering this as a fact, and that the eyes (like all other parts of the body) are controlled by the brain, reality is all about perception of senses.  We as humans can be tricked into believing that things are three-dimensional, floating, transparent, or even close to us (how close are stars to earth?)....\n\nI guess you could contemplate anything as reality...so you could see nearly anything...or if you contemplate nothing you could see nothing.\n\n    This message is not really here...it's all perception.\n\nAre you reading this?
184513
The human eye is naturally attuned to seeing patterns in your environment -- in motion, in background, etc.  This was an important survival skill for our primitive ancestors who needed to be able to recognize a tiger hiding in the undergrowth before the tiger recognized them.\n\nNowadays we tend to separate out significant or otherwise interesting patterns from the background clutter, and because we take note of these more than the rest, we tend to think them significant.  Try an experiment and write down EVERY number you see for an entire day, and then figure out if there are any odd patterns.  This means EVERY time you look at the clock, every number you see on the television, every license plate, etc.\n\nChances are you'll see that you're actually viewing thousands of uninteresting numbers each day, but only taking note of the repeating ones.  On the other hand, if you are seeing more repeating patterns than by random chance, then yes, it could mean something very interesting indeed.\n\nOtherwise, it's just you  :)
791454
Oh yes ,there are lots of humanity,it depends on how to look at.From the same position on earth, u can see the ground ,or u can see the sky,it all depends on u r angle of elevation,i mean how u look at it,choice is urs. in a greater perspective u have to look at what better u can derive from a adverse situation,there lies u r capability to correct the wrong  what u think with open ,unbiased mind &what  is socially,democratically is absolute right at that time.
830662
From Wikipedia: "The visible spectrum (or sometimes optical spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. There are no exact bounds to the visible spectrum; a typical human eye will respond to wavelengths from 400 to 700 nm, although some people may be able to perceive wavelengths from 380 to 780 nm."