Dictionary Home »
Medical Definitions » focus
focus medical definition
noun pl. fo·cus·es or fo·ci
- A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system. Also called focal point.
- See focal length.
- The distinctness or clarity of an image rendered by an optical system.
- The state of maximum distinctness or clarity of such an image.
- An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear.
- The region of a localized bodily infection or disease.
- To cause light rays or other radiation to converge on or toward a central point; concentrate.
- To render an object or image in clear outline or sharp detail by adjustment of one's vision or an optical device.
- To adjust a lens or instrument to produce a clear image.
- To converge on or toward a central point of focus; be focused.
Learn more about focus
Related Articles