Uhmmm Yes, he did!
From: Origin of the Species-
He discusses various simple eyes found in invertebrates, starting with nothing more than an optic nerve coated with pigment, as examples of how the vertebrate eye could have evolved in steps from much simpler structures. Darwin concludes: "If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down."
The human eye is a complex organ which could not possibly have been formed by numerous successive, slight modifications. As I have pointed out, a photocell eyespot is stimulated by lightness and darkness, it has no use for image. This organ would not require or need a lens to project an image, or any other component of a human eye, because it functioned in a completely different way. As I said, for your "theory" to work, it would have to completely contradict what Darwin said.