Complex sentence: The complex structure of the eye has been used as evidence to support creationism, as it has been said to be unlikely to have evolved via natural selection; in 1802, for example, philosopher William Paley called it a miracle of "design".
Split into simpler sentences: The complex structure of the eye has been used as evidence to support the theory that they have been designed by a creator, as it has been said to be unlikely to have evolved via natural selection. In 1802, philosopher William Paley called it a miracle of "design".