focal power


Also found in: Medical.

focal power

[′fō·kəl ‚pau̇·ər]
(optics)
A measure of the ability of a lens, mirror, prism, or optical system to converge a parallel beam of light; equals the reciprocal of the focal length. Also known as power.
References in periodicals archive ?
The inlay gently produces a smooth variation in focal power across the pupil by microscopically altering the surface shape of the cornea.
Each chapter approaches the very broad theme of "innovation dynamics" with lenses of varying focal power.
bridge due to its focal power and consequent (perhaps exclusive) ability
He smiled and told me it had now been scientifically proven that a carefully crafted photographic image can truly outperform our own fairly advanced focal powers.
The experimental lenses use different focal powers within a single lens: either alternating focal powers across the lens, or confined to the outer edge.