Meditation.
Start by lying comfortably on your bed. minus the pillow.
Breath in thru the nose,
Breath out though the mouth.
Count your breathing and try to imagine that you have a purple
colour fuzzy light the size of a ping pong ball just inches away
from the top bridge of your nose where your eyes are. Keep it
floating by means of your breathing in and out.
Clear your mind.
Close your eyes.
You developed cross eye, I cannot be held liable.