The present invention provides monofocal ophthalmic lenses that exhibit extended
depth of field while providing sufficient contrast for resolution of an image over
a selected range of defocus distances. In some embodiments, a lens of the invention
can include a refractive surface having controlled surface modulations relative
to a base profile. The surface modulations are designed to extend a depth of field
of the lens such that a single image can be resolved, albeit with somewhat less
contrast, over a range of distances greater than the focal region of a conventional
lens. The ophthalmic lenses of the invention can be employed in various vision
correction applications, including, but not limited to, intraocular lenses, contact
lenses, instrastromal implants and other refractive devices.
