General synonyms:
* Concentrated
* Attentive
* Intense
* Directed
* Sharp
* Clear
* Single-minded
* Determined
* Engaged
* Targeted
* Centered
More specific synonyms:
* Laser-focused: implies extreme precision and clarity
* Fixed: emphasizes a lack of movement or change in direction
* Zeroed in: implies a sense of accuracy and precision
* Locked in: suggests a strong sense of commitment and engagement
* Driven: implies a strong motivation and purpose
The best synonym for "focused" will depend on the specific context of your sentence.