Multi-focal intraocular lens system and methods for dynamic visual environments
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.
Claims5
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 photo sensor 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 method, comprising:
- 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.
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;
- means for detecting changes of the plurality of relative intensities;
- and
- means for estimating a pupil size based at least in part on at least one of the change in the spatial distribution and the changes of the plurality of relative intensities.
Dependencies are inferred from the claim text.