Which treatment for sun burnt eyes is the very best?

Rest and lubrication. Uv over exposure usually causes a mild punctate keratitis (small specks of dead cells on the skin of the cornea). If your eyes are healthy, it should heal itself within 48 hours. Try to rest your eyes, avoid sun and wind, and use a good quality artificial tear (systane ultra or refresh optive) as needed. See an md for any redness, pain or decreased vision.