pseudoaccommodation

pseudoaccommodation 

Attainment of functional near vision in an emmetropic or distance-corrected eye without changing the refractive power of the eye. It may occur when the pupil is very small thus increasing the depth of field, in a presbyopic eye corrected with a progressive addition lens, in a pseudophakic eye corrected with a multifocal intraocular lens implant (IOL), or occasionally as a result of spherical aberration or astigmatism induced by corneal incisions made to insert an IOL.
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Its unique apodized diffractive optic design provides pseudoaccommodation, which is the ability of a lens to focus light correctly on the retina for images at various distances without mechanical movement of the lens.