defocus


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defocus

(de-fo'kus) [L. de, away from, + focus, hearth]
The blurring of a visual image caused by spherical aberration, chromatic aberration, or diffraction. Also called optical defocus. Synonym: optical defocus

optical defocus

Defocus.

defocus

To put or go out of focus.
hyperopic defocus State of the eye in which the retinal image is focused behind the retina. It may occur when placing a negative lens in front of an emmetropic presbyopic eye; in an uncorrected presbyopic hyperope; in a high hyperope unable to overcome the ametropia by accommodating; or as an accommodative lag in an uncorrected or corrected myope, as well as in an emmetrope viewing a near object. See lag of accommodation; over-correction.
myopic defocus State of the eye in which the retinal image is focused in front of the retina. It may occur when placing a positive lens in front of an emmetropic eye; in an uncorrected or undercorrected myopic eye; or if there is a lead of accommodation, as is the case in some individuals viewing a distant object. See lead of accommodation; under-correction.
References in periodicals archive ?
07m, due to the rotation of the vortex, defocus before sharply focusing toward the vertical symmetry plane, where they cross their symmetric counterparts (not traced in the figure).
The Background Defocus mode, featured in the TX9 and WX5 models, provides artistic photos like those taken with a DSLR by making it easy to blur the image's background, putting the emphasis on your subject and creating a bokeh effect.
Because optical defocus selectively attenuates the contrast of higher spatial frequencies, older adults appear to be generally superior to younger ones in using residual low-spatial-frequency information to identify blurred text.
Observer Alajdin Demiri considers that the reactions of VMRO-DPMNE party against the platform of the Albanians serves to defocus the public from the real problems that should concern the citizens of Macedonia.
Called Background defocus, the new Sony application allows users to create a bokeh effect in your pictures, adding depth of field.
Finally, when you think you're done, center the star, defocus it, then slowly refocus while paying close attention to the dark hole at the center of the star image.
It is also possible to look images nicer even after shooting with Artistic Retouch (Creative Retouch, Defocus Effect, Color/Brightness Control), Beauty Retouch and Auto Retouch.
Ilija Dimovski, from VMRO-DPMNE's communication center, said he knew nothing about the case and that the opposition was trying to defocus the public by spreading speculations.
Ambiguities in wall parameters defocus and blur target image, and displace target away from its true position.
It is unacceptable for VMRO-DPMNE to fully defocus the energy directed toward the implementation of its 4-year program, the fight against crime and corruption, the handling of the effects of the economic crisis, the realization of the Euro-Atlantic aspirations and the pursuit of all other state and national interests just because of Branko Crvenkovski's bluffing and poker approach to politics," the announcement from VMRO-DPMNE's communication center says.
She added that the company felt making its salespeople sell vertical solutions would defocus them from their market space.