back focus

10 LETTERS · STARTS WITH B

back focus is a valid 10-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3A1C3K5F4O1C3U1S1

3 + 1 + 3 + 5 + 0 + 4 + 1 + 3 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does back focus mean?