Okay, stare at the image above for thirty seconds with both eyes. Now cover your left eye and look at for fifteen seconds. After that, cover your right eye and look at it (intensely) for twenty seconds. With both eyes open, look directly at the above image for another fifteen seconds.
You’re almost done. Next you need to look directly at the image while rapidly blinking each eye alternately. The last step is for you to turn your head (either to your left or right is fine, which ever is more comfortable). Turn your head as far as you can while still keeping the above image in your line of sight.
If all goes well, you should see lines and circles in a variety of colors. If you don’t, contact an opthalogical health professional immediately. And click the image to see it bigger.