Ophthalmic surgery measurement system
First Claim
1. An ophthalmic apparatus, comprising:
- a first laser configured to direct a first beam of light into an eye of a patient at a first non-zero angle with respect to an optical axis of the apparatus, such that the first beam of light propagates to a target area within the eye, and such that a portion of the first beam of light is scattered by the target area;
imaging optics positioned to receive light scattered by the target area, the imaging optics defining the optical axis of the apparatus;
a photosensitive element, wherein the imaging optics direct the light scattered from the target area to the photosensitive element; and
a processor configured to determine a distance between the cornea of the eye and the target area within the eye based at least in part on the light received by the photosensitive element.
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Accused Products
Abstract
An ophthalmic apparatus for measuring spatial distances within a patient'"'"'s eye is disclosed. The apparatus can be used to measure, for example, the capsular bag depth in an aphakic eye. The spatial measurement system can direct laser light into a patient'"'"'s eye so that a portion of the light is scattered by the capsular bag. The scattered light can be directed to a detector where spots can be formed corresponding to the locations on the capsular bag from which the light was scattered. The distance from the cornea to the capsular bag can be determined based, for example, at least in part on the distance between the spots formed on the detector. In some embodiments, the apparatus can include a surgical microscope and/or a wavefront aberrometer. In some embodiments, an alignment system can be used to precisely position the apparatus relative to the patient'"'"'s eye. The ophthalmic apparatus can be used for variety of ophthalmic procedures, such as predicting the postoperative position of an intraocular lens (IOL) and determining appropriate optical power for the IOL.
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Citations
28 Claims
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1. An ophthalmic apparatus, comprising:
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a first laser configured to direct a first beam of light into an eye of a patient at a first non-zero angle with respect to an optical axis of the apparatus, such that the first beam of light propagates to a target area within the eye, and such that a portion of the first beam of light is scattered by the target area; imaging optics positioned to receive light scattered by the target area, the imaging optics defining the optical axis of the apparatus; a photosensitive element, wherein the imaging optics direct the light scattered from the target area to the photosensitive element; and a processor configured to determine a distance between the cornea of the eye and the target area within the eye based at least in part on the light received by the photosensitive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of using an ophthalmic apparatus, the method comprising:
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positioning the ophthalmic apparatus at a predetermined position over an eye of a patient, wherein an optical axis of the apparatus intersects the cornea of the eye; directing light from one or more lasers positioned about the optical axis of the apparatus into the eye so that a portion of the light from the one or more lasers is scattered by a target area inside the eye; directing a portion of the light scattered by the target area to a photosensitive element using imaging optics that define the optical axis; forming one or more target spots on the photosensitive element, the one or more target spots corresponding to the light from the respective one or more lasers scattered by the target area; calculating the distance between the cornea of the eye and the target area based at least in part on the positions of the one or more target spots. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification