The "Covering the Eyes" lesson is featured in the book, "The Brain's Way of Healing" by Norman Doidge
Covering the eyes, otherwise known as palming the eyes, is an essential metric in this lesson. By covering the eyes, we can track the progressive relaxation of the optic nerve. Because we do a series of specific movements, the optic nerve relaxes. When the optic nerve is quiet, then blackness begins to emerge in the visual field. The actions we do are saccades (jumping movements), vergence, and squeezing the eyes.