Quick Eye Exam...

This will blow your mind...!
 Just do it - don't cheat!!!!!!!!!!!!
 Try this its actually quite good.
 But don't cheat!
 Count the number of F's in the following text:
 FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
 STUDY COMBINED WITH THE
 EXPERIENCE OF YEARS
 Managed it?

 Scroll down only after you have counted them!

 Wrong, there are six - no joke!
Read again!
FINISHED FILES ARE THE
 RESULT OF YEARS OF SCIENTIFIC
 STUDY COMBINED WITH THE
 EXPERIENCE OF YEARS

The reasoning is further down...

The brain cannot process the word "OF".
 Incredible or what?
Anyone who counts all six F's on the first go is a genius
 Three is normal.