title: Four concepts held by modern optometry/their origin...and...their future.
mesh_terms: D001519:Behavior; D004496:Education, Continuing; D005139:Eyeglasses; D006801:Humans; D007858:Learning; D009907:Optometry / Q000193:education / Q000639:trends*; D010684:Philosophy; D012030:Refractive Errors / Q000517:prevention & control / Q000523:psychology; D014481:United States; D014785:Vision, Ocular