You can argue that the original organism had better eyesight than others of his species and therefore the
change increased his ability to survive, but you ignore that the
change had to occur in the first place, and if there was a
change in the first animal the interconnectedness of the
related bodily functions makes it impossible for the chance
change — which by the way required the loss of genetic material — to have happened regardless of the amount of time you had.
[I] t is still hotly debated whether the
bodily changes associated with different emotions are specific enough to serve as the basis for discrete emotional feelings, such as anger, fear, or happiness, and the topographical distribution of the emotion -
related bodily sensations has remained unknown.