ARTIFICIAL ASYMMETRICAL PUPIL FOR EXTENDED DEPTH OF FIELD

摘要

An ocular device comprising an artificial pupil with at least one aperture fitted into a screen of artificial ocular material such that the artificial pupil provides a combination of functions including a lens function by diffraction by, at least one, Fresnel zone in combination with extension of the depth-of-field. Asymmetrical pupil shapes are disclosed to provide extended depth-of-field and add-on optical power along a selected axis or multiple axes which designs can also be applied to treat, for example, astigmatism.