In certain embodiments, a surgical contact lens system for ophthalmic treatment with a laser beam includes a patient contact lens and a surgical contact lens. The patient contact lens reduces one or more refractive errors of the eye and has a concave surface and a convex surface. The concave surface is to be disposed outwardly from a cornea of an eye. The surgical contact lens has an eye end to be disposed outwardly from the convex surface of the patient contact lens. The surgical contact lens includes a frame and an optical component coupled to the frame. The patient contact lens reduces pressure from the surgical contact lens to reduce corneal folding of a posterior surface of the cornea. The optical component of the surgical contact lens and the patient contact lens transmit the laser beam to treat the eye.

In certain embodiments, an ophthalmic laser system includes a laser device, an ophthalmic microscope, a z-direction sensor, and a controller. The laser device directs a laser beam towards a target within an eye. The ophthalmic microscope receives light from a focal point within the eye to provide an image of an object at the focal point. The z-direction sensor determines the z-position corresponding to the focal point of the ophthalmic microscope. The controller determines a position Z.sub.0, the z-position where the focal point of the ophthalmic microscope is at the retina of the eye; determines a position Z, the z-position where the focal point of the ophthalmic microscope is at the target within the eye; calculates a target-to-retina distance ΔZ according to a difference between the position Z and the position Z.sub.0; and calculates a radiant exposure H.sub.e at the retina according to the target-to-retina distance ΔZ.

In certain embodiments, an ophthalmic laser system for treating a floater in a vitreous of an eye includes a laser device that directs laser pulses towards the floater to yield cavitation bubbles that create a bubble jet to treat the floater. In some examples, the laser device includes a beam multiplexer that splits a laser beam into multiple beams that form the cavitation bubbles that create the bubble jet. In some examples, the laser device directs laser pulses towards the floater according to a pulse pattern that forms the cavitation bubbles that create the bubble jet.

In certain embodiments, an ophthalmic laser system for treating a floater in a vitreous of an eye includes a laser device that directs laser pulses towards the floater to yield cavitation bubbles that create a bubble jet to treat the floater. In some examples, the laser device includes a beam multiplexer that splits a laser beam into multiple beams that form the cavitation bubbles that create the bubble jet. In some examples, the laser device directs laser pulses towards the floater according to a pulse pattern that forms the cavitation bubbles that create the bubble jet.

In certain embodiments, an ophthalmic laser surgical system for treating a target tissue in an eye includes a target detection system and a laser device. The target tissue has an optical breakdown threshold. The target detection system directs detection beams along a detection beam path towards the target tissue in a vitreous of the eye, and determines a location of the target tissue within the vitreous. The laser device includes a femtosecond laser that generates subthreshold laser pulses that have a pulse energy below the optical breakdown threshold of the tissue. The laser device directs a laser beam comprising the subthreshold laser pulses along a laser beam path towards the target tissue.

In certain embodiments, an ophthalmic laser surgical system for imaging and treating a target in an eye includes a laser device, imaging system, and computer. The laser device directs the focus of a laser beam towards an intended location (x0, y0, z0) of the target to yield a cavitation bubble in the vitreous. The imaging system directs imaging beams towards the target, receives the imaging beams reflected from the eye, generates an image of the cavitation bubble from the reflected imaging beams, and measures an actual location (x, y, z) of the cavitation bubble according to the image. The computer determines an error vector that describes an error between the intended location and the actual location, determines a correction vector to compensate for the error, and instructs the laser device to use the correction vector to direct the laser beam towards the target to treat the target.

In certain embodiments, an ophthalmic laser surgical system for treating a floater in an eye includes a scanning laser ophthalmoscopy (SLO) device, a treatment laser device, and an xy-scanner. The SLO device directs an SLO beam towards the retina of the eye, generates an image that includes the floater shadow from the SLO beam reflected from the eye, determines the xy-location of the floater shadow, and determines the z-location of the floater relative to the retina using the confocal filter. The treatment laser device receives the z-location of the floater from the SLO device, and directs a laser beam towards the z-location. The xy-scanner receives the SLO beam from the SLO device and directs the SLO beam towards the xy-location of the floater shadow. The xy-scanner also receives the laser beam from the treatment laser device and directs the laser beam towards the xy-location of the floater shadow.

In certain embodiments, an ophthalmic laser surgical system for imaging and treating a target in an eye includes a digital micromirror device (DMD) confocal microscope, a laser device, and a computer. The DMD confocal microscope generates of images of the eye and includes a light source, a DMD device, and an image sensor. The light source provides a microscope imaging beam. The DMD device directs the microscope imaging beam along an imaging path towards the eye, receives the microscope imaging beam reflected from the eye, and rejects light of the reflected microscope imaging beam that is not from an image plane to scan the microscope imaging beam. The image sensor detects the scanned microscope imaging beam to generate the images of the eye. The laser device directs a laser beam along a laser beam path towards the target in the eye.

In certain embodiments, an ophthalmic system includes an anamorphic depth gauge (ADG) device and a computer. The ADG device measures the z-location in the interior of an eye and includes a detector array arranged at an oblique angle with respect to the z-axis. The array generates a detector signal in response to detecting a light beam, which has a z-focus in the interior of the eye. A set of line focus optical elements focuses the light beam to form a line focus on the detector array, and a set of nominal focus optical elements focuses the light beam to form a nominal focus on the detector array. The computer: generates an image using the detector signal; determines the position of the nominal focus on the line focus according to the image; and determines the z-location of the z-focus from the position of the nominal focus on the line focus.

A method of performing laser surgery in a patient's eye includes generating a light beam, deflecting the light beam using a scanner to form an enclosed treatment pattern that is configured to form an enclosed capsulorhexis incision that includes a registration feature, and delivering the enclosed treatment pattern to target tissue in the patient's eye to form in an anterior lens capsule of the patient's eye the enclosed capsulorhexis incision that includes the registration feature. The registration feature is configured so that an edge of the target tissue formed by the enclosed capsulorhexis incision mates with an intraocular lens registration feature on an intraocular lens so as to rotationally register the intraocular lens relative to the registration feature.