Luke 2:30 - Ellicott's Commentary On The Whole Bible

Mine eyes have seen thy salvation. — The Greek word is not the usual feminine noun expressing the abstract idea of salvation, but the neuter of the adjective — that which brings or works out salvation. Its use here is probably determined by its appearance in the LXX. version of Isaiah 52:10, as quoted in Luke 3:6. He saw in that infant child the means of deliverance for the world.