1. [adj]  of an optical system (e.g. eye or opera glasses) adjusted to produce a clear image
2. [adj]  concentrated on or clustered around a central point or purpose
3. [adj]  (of light rays) converging on a point; "focused light rays can set something afire"
4. [adj]  being in focus or brought into focus

FOCUSED is a 7 letter word that starts with F.