MULTIFOCAL OPHTHALMIC LENS AND MANUFACTURING METHOD THEREOF

摘要

In order to reduce halos that occur in multifocal ophthalmic lenses, the mechanism of the phenomenon was elucidated and a solution was found based on the results. Thus provided are a multifocal ophthalmic lens having a structure and a manufacturing method for the same which can effectively reduce halos. A multifocal ophthalmic lens having a focal point formation region provided to an optical portion of a lens, which forms at least two focal points, wherein a cancellation region is provided to the optical portion, the cancellation region providing diffracted light of an amplitude distribution that reduces, on the image plane of the first focal point among the focal points, the amplitudes of light other than the light that forms the first focal point.

主权项

1. A multifocal ophthalmic lens having a focal point formation region which is provided in an optical part of the lens and gives at least two focal points, comprising
at least one cancellation region being provided in the optical part that, on an image plane at a first one of the focal points, produces a diffracted light with an amplitude distribution that reduces amplitudes of a light other than the one that forms the first focal point.