The caveat is, of course, NO STARING AT THE SUN...
I am aware of one yogic method that says it is not only alright but
beneficial to gaze directly at the sun but for only for a short time in the
morning as the sun comes over the horizon and when the sun sets.
Then, there is this quote from
KAHUNA EYE EXERCISES
ABRAHAM KAWAI'I
Sungazing is a way of eliminating yesterdays light. Palm the eyes using
light pressure for 15 seconds. Note if the vision is totally black or if it
has white or variations of colors. It should be totally black. Any colors or
whiteness signifies the cells
