The practice of ophthalmology in Ancient Greece can be divided into the pre-classical and classical period. In 
the pre-classical period, divine interventions were believed to be essential for curing any diseases. There were 
some 30 gods in Greece who interested themselves in some aspect of medicine; and the offering of sacrifices 
and gifts of votice offerings were essential for an effective cure. In classical Greece, with the appearance of 
Hippocrates of Kos, the practice of medicine was divorced from religion. His writtings described several eye 
conditions, observersation and cures.