Dancers have better than average peripheral vision. Head angles are prescribed by the dance, so dancers have to use their eyes themselves if they want to look to the side, without turning their heads.
First balled dancer
First balled dancer that used pointe shoes was Marie Taglioni in 1832 ballet "La Sylphide".
Medieval dance
History of European medieval dance is fragmented and limited, but is believed that simple folk dances were widespread among common and wealthy classes.