Intraocular lens systems and methods
AssigneeSee Again Europe Limited
InventorBrendan Joseph Moriarty
Life of this patent
Estimating the term…
Abstract
An intraocular lens (31) which may be used as a posterior lens in a lens train including a converging anterior lens (20) and diverging posterior lens (31) in which the optical/focal axes of the two lenses are not coincident such that the focal point (9) of the lens train is offset from the focal axis of the anterior lens. Light rays (50) incident upon the anterior lens parallel to its focal axis may thus be directed (51) to parts of the retina offset from the fovea where the macula may not have degenerated.
Claims30
A method of providing an intraocular lens train for forming in an eye an image of an object or scene external to the eye including:
- providing a posterior intraocular lens apparatus including:
- a diverging lens shaped to define as between opposite operative lens surfaces a lens part of minimal lens thickness surrounded by lens parts of greater lens thickness;
- a haptic extending from the diverging lens to a first haptic part at an intermediate distance from the lens part of minimal lens thickness, and further extending from the diverging lens to a second haptic part at a maximal distance from the lens part of minimal lens thickness;
- wherein the maximal distance is greater than the intermediate distance and the second haptic part opposes the first haptic part across the lens part of minimal lens thickness;
- providing an anterior intraocular lens apparatus including:
- a converging lens adapted to cooperate with the diverging lens;
- positioning the diverging lens in the posterior sac of the eye using said haptic;
- positioning the converging lens in the anterior sac of the eye between the diverging lens and the object or scene to be imaged such that an operative lens surface of the converging lens opposes an operative lens surface of the diverging lens and such that the lens part of minimal lens thickness does not oppose the centre of the converging lens.
A method of providing an intraocular lens train for forming in an eye an image of an object or scene external to the eye including:
- providing a posterior intraocular lens apparatus including:
- diverging lens shaped to define as between opposite operative lens surfaces a lens part of minimal lens thickness surrounded by lens parts of greater lens thickness;
- a first haptic extending from the diverging lens to a first haptic part at a first maximal distance from the lens part of minimal lens thickness;
- a second haptic separate from the first haptic and extending from the diverging lens to a second haptic part at a second maximal distance from the lens part of minimal lens thickness;
- wherein the second maximal distance is greater than the first maximal distance.
- providing an anterior intraocular lens apparatus including:
- a converging lens adapted to cooperate with the diverging lens;
- positioning the diverging lens in the posterior sac of the eye using said first haptic and said second haptic;
- positioning the converging lens in the anterior sac of the eye between the diverging lens and the object or scene to be imaged such that an operative lens surface of the converging lens opposes an operative lens surface of the diverging lens and such that the lens part of minimal lens thickness does not oppose the centre of the converging lens.
Dependencies are inferred from the claim text.