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 "The Essene Gospel of Peace": "Follow, therefore, only the laws or your Earthly Mother, of which I have told you. And when her angels have cleansed and renewed your bodies and strengthened your eyes, you will be able to bear the light of our heavenly Father. When you can gaze on the brightnes of the noonday sun with unflinching eyes, you can then look upon the blinding light of your Heavenly Father, which is a thousand times brighter than the brightness of a thousand suns. But how should you look upon the blinding light of your heavenly father, when you cannot even bear the shining of the blazing sun? Believe me, the sun is as the flame of a candle beside the sun of truth of the Heavenly Father...If you believe in the angels of the Eathly Mother and do her laws, your faith shall sustain you and you shall never see disease." Chris