alternate kanji?

is there such a thing or am i retarded?

見る　and 観る　are both pronounced miru and both mean to watch or look?

分かれ道　pronounced wakaremichi and means splitting path
別れ道　pronounced wakaremichi and means separate path?
not sure about that

also
 陰　and 影　both pronounced kage and both mean shadow？

is this right?

whats the difference between both of these kanji? 目 眼　When alone are they both read as め?