Multifocal, especially bifocal, intraocular, artificial ophthalmic lens
AssigneeStorz Instrument Company
InventorsManfred Achatz, Peter Hofer, Jurgen Strobel
Life of this patent
Estimating the term…
Abstract
A multifocal, especially bifocal, intraocular, artificial ophthalmic lens of transparent material, whose optical lens portion is divided into near range and far range zones and, each of which is disposed on the optical lens portion with approximately equal surface proportions and symmetrically with the lens axis.
Claims19
In a multifocal, especially bifocal, artificial, intraocular, ophthalmic lens adapted to be implanted in the eye at a fixed position and having a transparent optical lens portion for covering the pupil of the iris and means for holding said lens portion in a fixed position in the eye, the improvement wherein near range and far range zones (N and F) of the optical lens portion have approximately equal areas symmetrically about the axis of the optical lens portion, such that rays received by the pupil of the eye in which the lens is fixed pass through both near and far range zones of the lens of approximately equal area, for simultaneous, sharp near and far vision.
In a multifocal, especially bifocal, artificial, intraocular, ophthalmic lens adapted to be implanted in the eye at a fixed position and having a transparent optical lens portion for covering the pupil of the iris and means for holding said lens portion in a fixed position in the eye, the improvement wherein the optical lens portion has near and far range zones located symmetrically about the axis of the optical lens portion, such that rays received by the pupil of the eye in which the lens is fixed can pass through approximately equal areas of said near range and far range zones for simultaneous, sharp near and far vision.
In a multifocal, especially bifocal, artificial, intraocular, ophthalmic lens adapted to be implanted in the eye at a fixed position and having a transparent optical lens portion for covering the pupil of the iris and means for holding said lens portion in a fixed position in the eye, the improvement wherein the optical lens portion has zones located symmetrically about the axis of the optical lens portion, such that the rays of light received by the pupil of the eye in which the lens is fixed pass through said zones, said rays being directed by said zones into near and far foci of approximately equal amounts of light for simultaneous, sharp near and far vision.
Dependencies are inferred from the claim text.