MULTIFOCAL INTRAOCULAR LENS WITH EXTENDED DEPTH OF FIELD
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United States of America Patent
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Sep 23, 2015
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Sep 25, 2014
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Abstract
Multifocal intraocular lens with extended depth of field that comprises, in at least one of the surfaces (2), a small zone with a multifocal profile with a defined optical axis (3) and, in the peripheral region and coaxial to the multifocal zone, a ring-shaped opaque mask (1) that partially or totally block light to produce a small aperture effect and, therefore, the multifocal profile has a radius equal or larger than the internal radius of the mask (1), and there is at least one transition between focal zones or one diffractive step inside the internal radius of the mask (1).
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