Ga-Ryou-Ten-Sei

The finishing touches.
The finishing strokes.

A priest painted dragon's picture.
The dragon soared high into the sky when the priest finally painted eyes.
This idiom signify the important finishing touches.

kanji meanings :

• Ga = a picture. a painting. a sketch. a drawing. an illustration. (= E).
  a stroke. (= Kaku).
  


• Ryou = Ryuu = a dragon.
  


• Ten = a dot. a point. a speck.
  a punctuation mark. a period. a decimal point.
  a mark. a grade. a score. a run. a goal.
  a standpoint. a viewpoint. an aspect. a respect. a way.
  a piece.
  


• Sei = the pupil. the pupil of an eye.
  (This kanji is not much used. )