Nilsson D E
Department of Zoology, University of Lund, Sweden.
Curr Biol. 1996 Jan 1;6(1):39-42. doi: 10.1016/s0960-9822(02)00417-7.
The vast differences between vertebrate and arthropod eyes suggest that the recently discovered homologous master control genes for eye development had another function before eyes evolved in the early Cambrian.