Multifocal intraocular lens with extended depth of field
AssigneeCarl Zeiss Meditec AG
InventorSergio Oscar LUQUE
Life of this patent
Estimating the term…
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).
Claims18
Multifocal intraocular lens with extended depth of field, comprising in, at least one of the surfaces, a small zone with a multifocal profile with a defined optical axis and, in the peripheral region and coaxial to the multifocal zone, a ring-shaped opaque mask 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, and there is at least one transition between focal zones or one diffractive step inside the internal radius of the mask, and wherein the optical axis is misaligned with respect to the geometrical center of the lens.
(canceled)
Dependencies are inferred from the claim text.