Of Blood and Revenge.
I never really understood why I choose to direct that level of energy down my index finger and visualize someone else's eye.You have to usually be loaded on something, the usual list of body fluids and usually for a while.Having some kind of "strength" from some inner movement on your torso helps,not playing with your asshole also helps a lot.
You move your inner thighs in such a way that you feel some energy moving down towards the eyes of the person you are visualizing.You should be able to feel a sharp slicing pain in your eye if you do it correctly.You should hear some kind of "feedback",objects or strange sounds emanating from your room as you do this.There is a bunch of tricks that can be done to mitigate the effect.
Generally you can usually lead someone to either utter madness,distraction but it is unlikely you will do anything to actually maim the eye.
Secrets would be secrets,it is just I've yet to meet anyone who came close to me.