get one's eye in

/G EH1 T W AH0 N EH0 S AY0 IH0 N/
verb
  1. 1

    To become accustomed to the playing conditions, and thus bring one's hand-eye coordination to a reasonable level.

  2. 2

    To develop a perceptual skill, especially visual.

Source: https://en.wiktionary.org/wiki/get%20one's%20eye%20in