This thread is to discuss steps that I believe would be impossible for evolution to take due to intermediary steps that would not fit the evolutionary theory. An example: The eye-ball and associated nervous system transmission system and visual processing system (visual portion of the brain). Are there steps involved in coming to a complete eye-ball with auto-focusing lens system, high-dynamic range iris, clear protective fluid. Very complex and high definition detector (retina) which includes both low-level black and white sensors and color sensors that can kick in with more light. Remember that the picture is inverted on the retina and the recognition system must convert it so what we perceive as an upright and useable scene. The system is better and more complex than any mechanically designed video camera system. Let us discuss what steps would have to be taken to go from light-detection (period) and why, to a complete functional stereo video system with depth perception. Remember, every single step MUST improve the creature on which the eyes develope otherwise the mutation would not have lasted. This is not just to discuss the eyes it can also discuss other features whether microscopic or macroscopic. We who do not believe in evolution will provide these features and evolutionists may provide information as to "how" the features came to be, with each rebutting. Let us keep this thread specific to these features and not get into a fuss about who knows the most about the subject and also try to stick to facts that we can state and can be understood here, not to just pointing to some obscure scientific paper written by ANY scientist. There is enough knowledge here that we should be able to discuss this in understable levels. So, my first question is how did a light sensor first develop and what form would it take?