Adaptively focusing extra-ocular vision prostheses
First Claim
Patent Images
1. A vision prosthesis comprising:
- an actuator in communication with an extra-ocular lens, the actuator providing a focusing stimulus to vary a focal length of the lens;
a biofeedback system for identifying, at least in part on the basis of cues provided by a wearer of the vision prosthesis, a gaze direction leading to an object;
a rangefinder for estimating a range to the object; and
a controller in communication with the rangefinder and the actuator, the controller being configured to cause the actuator to generate the focusing stimulus on the basis of the range estimate.
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Abstract
A vision prosthesis includes an actuator in communication with an extra-ocular lens. The actuator providing a focusing stimulus to vary a focal length of the lens. A rangefinder estimates a range to an object and provides the range estimate to a controller. The controller causes the actuator to generate the focusing stimulus on the basis of the range estimate.
52 Citations
19 Claims
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1. A vision prosthesis comprising:
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an actuator in communication with an extra-ocular lens, the actuator providing a focusing stimulus to vary a focal length of the lens; a biofeedback system for identifying, at least in part on the basis of cues provided by a wearer of the vision prosthesis, a gaze direction leading to an object; a rangefinder for estimating a range to the object; and a controller in communication with the rangefinder and the actuator, the controller being configured to cause the actuator to generate the focusing stimulus on the basis of the range estimate. - View Dependent Claims (2, 3, 4, 5)
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6. A method for assisting a patient in focusing on an object, the method comprising:
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providing an extraocular lens for the patient to look through, the extraocular lens having a variable focal length; identifying, at least in part on the basis of cues provided by a wearer of the vision prosthesis, a gaze direction leading to an object within a field of view of the extraocular lens; estimating a distance to the object; and causing the focal length to change in response to the estimate. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for correcting vision, the apparatus comprising:
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means for identifying, on the basis of cues provided by a wearer of an extraocular lens, a gaze direction leading to an object in the field of view of the extraocular lens; means for estimating a range to the object; and means for varying a focal length of an extra-ocular lens on the basis of the range estimate. - View Dependent Claims (16, 17, 18)
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19. A vision prosthesis comprising:
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an actuator in communication with an extra-ocular lens, the actuator providing a focusing stimulus to vary a focal length of the lens; a biofeedback system for estimating the distance to an object in the field of view of the extra-ocular lens on the basis of cues provided by a wearer of the vision prosthesis; and a controller in communication with the rangefinder and the actuator, the controller being configured to cause the actuator to generate the focusing stimulus on the basis of the range estimate.
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Specification