Angle your head so that eyes are aimed about 10–15 degrees above the sun, not directly at it. Now open your eyes quickly and blink very rapidly, for about 3 seconds, or about 10 times. Then close eyes, tilt head away from sun, and pause for brief rest. Tilt head back towards sun, eyes closed, this time with eyes aimed 10–15 degrees below the sun. R

It advises exposing both the naked body and the naked eyes directly to sunlight in order to assimilate vital solar energy. It states unequivocally that exposing the eyes to direct sunlight greatly benefits the brain by stimulating secretions of “vital essence” there.

Stand or sit comfortably outdoors with head tilted toward the sun, eyes closed. Angle your head so that eyes are aimed about 10 to 15 degrees above the sun, not directly at it. Now open your eyes quickly and blink very rapidly for about 3 seconds, or about 10 times. Then close eyes, tilt head away from sun, and pause for brief rest. Tilt head back