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US 8,377,124 B2Granted
Two-element system to provide an ease of accommodation with variable-spherical aberration control
AssigneeNovartis AG
InventorsXin Hong, Xiaoxiao Zhang
Life of this patent
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Abstract
In one aspect, the present invention provides a two-element ophthalmic lens in which a lateral shift of the elements relative to one another can cause a variation not only in a spherical power provided by the lens but also in spherical aberration exhibited by that lens. In some implementations, the thickness profiles of the two elements are designed such that the variation in spherical aberration is positively correlated with that of the spherical power of the lens.
Claims8
An IOL, comprising
- an anterior optic and a posterior optic disposed about an optical axis,
- at least two haptics each coupled to one of said optics,
- a plurality of flexible hinges connecting said two haptics so as to allow lateral movement of the two haptics relative to one another, thereby causing a lateral movement of said optics relative to one another, the flexible hinges having a parallelogram-shaped cross-section in a plane defined by the optical axis and a direction of the lateral movement, the parallelogram-shaped cross-section having a major diagonal extending between opposite corners connected to the haptics at hinge joints and a minor diagonal shorter than the major diagonal, wherein the flexible hinges flex only at the hinge joints;
- wherein said optical element are configured such that said lateral movement causes a change in a combined optical power provided by said optics as well as spherical aberration exhibited by a combination of said optics.
1 more element
Dependencies are inferred from the claim text.