Vision is the ability some living beings
to , to distinguish and to
luminous stimuli.

Vision is on earth mainly in
terrestrial and in the
aquatic habitats because our is
intensely exposed to and thus
light and become distinguishing
factors of present in the
environment, at distance. This
distinction new survival
strategies for organisms,new
protection mechanisms against
dangers, new ways to food and to
communicate other individuals,
new types courting and reproduction
behaviors, . That is, it created
possibilities of interaction with
surrounds and increased capacity
explore new ecological niches.