1. Concentrating attention or effort on a limited, specific area or topic; having a restricted scope of attention
The researcher took a narrow-focus approach to studying only one aspect of the disease.
O pesquisador adotou uma abordagem de foco estreito, estudando apenas um aspecto da doença.
2. In optics or photography, a lens or beam that concentrates light or attention on a small area
The narrow-focus beam illuminated only the target area.
O feixe de foco estreito iluminou apenas a área alvo.