Neue Graka "oda was" ?

1.  If your screen refreshes at 85Hz and your game runs at 50Hz (=50fps): Are you sure that you don't need to synchronize them? Are you sure, you don't need to play with a multiple of 85 to enjoy synchronized refresh updates? So the game running at 85fps may better than at 100fps. Maybe even a TFT display was better. It displays only with about 40fps but progressively.
   2. Even though single eye cells (rods and cones) may have their limitations due to their chemical reaction times and due to the distance to the brain, you cannot be sure how they interact or complement or synchronize. If 1 cell is able to perceive 10fps, 2 cells may be able to perceive 20fps by complementing one another. So don't confuse "The human eye" with "The cell".
   3. Some eye cells are reacting only when a stimulus is moving. Some react when it's moving from A to B, some when it's moving from D to Z. This may complicate frame-based simulation of reality.
   4. Motion of your body could alter the way how you perceive. Do you get headaches after watching 3 movies in the cinema in a row? Maybe that's because you didn't move with the filmed motion? This is the reason for front-passengers' indispositions (= somebody else moved the car) and seasickness (=the sea moved the ship suddenly). Maybe this is the reason why 3D gaming glasses will never work perfectly. And this has nothing to do with frame rates.
   5. When you look straight (= with the center of your eyes) it's not the same as if it was with the sides of your eyes. The sides are more sensitive to brightness and to flickering. The next time you are in the cinema do the following: Look up to the ceiling while the movie is playing. Especially during bright/white scenes you will clearly notice that the movie flickers.
   6. Sensitivity to blue is different than to green: You see green best, even when it's dark, e.g. leaves in a forest at night. So "blue frames per second" may differ from "green frames per second"
   7. Do you like to play Quake? Do you think "More is better"? Maybe that's why you think 200fps is better than 180fps.
   8. Do you think moving in 3D games is stuttering? Maybe your mouse scans motion with too little dpi (Dots Per Inch) or fps (Frames Per Second)?
   9. Do you think it is important that a graphics card can display 250 fps in your favourite game, because that's a feature they write about in PC magazines and on covers?
      Now this is just a figure to show how fast the card is, not to show that you need such a high frame rate. It's like with cars: 100km/h in 5 seconds. When will you ever need to go 100km/h in 5 seconds?