How many frames can human eye see? 
*

*What's the limitation of our eyes? 

*Can we differentiate 60fps from 120fps? 

*Are new 144hz monitors just a marketing trick?
Couldn't find any proper journals or studies about the matter.
 A: The conscious part of the human brain cannot process visual information that persists for less than about .04 seconds while the subconscious part is thought to be faster. What the brain is doing is pattern recognition in either case (which requires a considerable amount of mental processing).  The issue is how long does this mental processing require and the implication is that the subconscious is faster than the conscious. 
In the field of intelligence there is an hypothesis (based upon the above) called the 25th frame effect. If true it would enable someone to transmit subliminal information via a 25 fps video that incorporates an out of context frame at every 25th position. The subject would not be conscious of this attempted manipulation. 
There was a rumor during the 1950s that movie theaters were subliminally encouraging customers to purchase food and drink items by inserting 25th frame images (of coke or popcorn, for example) just before the intermission. Congress passed a law against such subliminal manipulation as a result of this rumor.
During a presidential campaign in the US a number of years ago an add was aired in support of a republican candidate that included the word "Democrats" in the message. Some people noticed a flicker in the film while this word appeared and it was discovered that one frame of the add had dropped the first five letters of the word leaving "rats."  The republicans vowed that this was not an illegal 25th frame attack against their opponent (attempting to form a subliminal association between Democrats and rats in the minds of voters) and no legal action was taken. 
A: Different parts of the eye have different response speed. The corner of your eye doesn't see color, but is fast; the center sees color, and is slower. This means that when you look at a 60 Hz monitor straight-on, the image is perfectly steady; but when you look at it from the corner of your eye, it is flickering. As you go to even higher frequencies of refresh, even the rods don't respond fast enough.
This make sense from an evolutionary perspective. When the saber-toothed tiger jumps at you, you need to know about it - quickly. You don't need to know its color. So using the faster rods (sensitive, fast, no color sense) in the edge of the field of view is a good survival strategy. But since we can't move very far in 1/100th of a second, there is no need for sensors that respond at that speed.
The difference is real, and can be perceived. In the corner of your eye, for most people.
Incidentally, the rendering of fast motion is helped by the higher frame rate; if you show a bright object against a dark background moving left-to-right across the screen in 1/30th of a second, the brain will notice the difference between "two images comprise the full motion" and "four images comprise the full motion", even if you don't really perceive the individual frames. You will see a smoother action when more frames make up the motion: after all, in real life you really see "infinitely many frames" even though they blur together.
