Multi-Focal Intraocular Lens System and Methods
AssigneeElenza, Inc.
InventorJack T. Holladay
Life of this patent
Estimating the term…
Abstract
The invention pertains to methods, components, and operations of multi-focal intraocular lens systems, including range finding for driving same and for discriminating between multiple objects and varying brightness conditions. The invention also pertains to intraocular photosensors and range-finding methods to be used with intra-ocular lens systems, and components, that provide multi-focal IOL capabilities in dynamic visual environments.
Claims62
-20. (canceled)
A method for adjusting a multi-focal intraocular lens system to bring an object of regard into focus, comprising the steps of:
- measuring a spatial distribution of light traversing a pupil;
- estimating a distance to the object of regard based on the spatial distribution;
- and
- adjusting a focal length of the multi-focal lens system based on the distance to bring the object of regard into focus.
A method for taking into account pupil size changes due to respective variations in ambient brightness when determining changes in distance to an object of regard based on pupil size measurements, comprising:
- discriminating between a pupilary brightness reflex and a synkinetic reflex using an intraocular photosensor and a processor to measure and estimate a pupil size, a light intensity, a change in a the light intensity, and a degree of ocular convergence;
- and
- estimating a distance to an object of regard based on said discriminating.
A range-finding apparatus, comprising
- a photosensor operable to detect light incident on a pupil of an eye;
- and
- a processor operable to estimate a range to an object of regard based on light detected by the photosensor.
An intraocular photosensor for measuring light that has traversed a pupil of an eye comprising:
- means for detecting a spatial distribution of light;
- means for detecting a change in the spatial distribution;
- means for detecting a plurality of relative intensities;
- and
- means for detecting changes of the plurality of relative intensities.
An apparatus for use in enhancing human vision comprising:
- a lens system having an adjustable focal length and including an actuator for adjusting a focal length;
- a range-finder for estimating a distance to an object of regard;
- and
- a controller coupled to a lens system and a range-finder for controlling an adjustment of the focal length of the lens system based on the estimated distance obtained by the range-finder.
A lens system apparatus comprising:
- means for adjusting at least one of an index of refraction and a focal length;
- means for estimating a distance to an object of regard;
- and
- means for adjusting at least one of the index of refraction and the focal length based on the estimated distance to achieve the focus on the object of regard.
An intraocular photosensor for measuring light that has traversed a pupil of an eye comprising:
- means for detecting a spatial distribution of light;
- and
- means for detecting a change in the spatial distribution.
A method, comprising the steps of:
- detecting incident light through a pupil;
- estimating a size of the pupil;
- estimating a relative brightness of the incident light;
- and
- estimating a distance to an object of regard.
Dependencies are inferred from the claim text.