title: Aztec and Maya public health and preoptometry in Mexico.
mesh_terms: D049668:History, 15th Century; D049669:History, 16th Century; D049691:History, Medieval; D007198:Indians, North American / Q000266:history*; D008800:Mexico; D009907:Optometry / Q000266:history*; D011634:Public Health / Q000266:history*