VERB (3)

1. focus once again; The physicist refocused the light beam";

2. focus anew;
- Example: "The group needs to refocus its goals"

3. put again into focus or focus more sharply;
- Example: "refocus the image until it is very sharp"

WordNet (r) 3.0 (2006):

refocus
    v 1: focus once again; The physicist refocused the light beam"
    2: focus anew; "The group needs to refocus its goals"
    3: put again into focus or focus more sharply; "refocus the
       image until it is very sharp"