초록 ▼

Embodiments of the invention provide methods and systems for analyzing the ophthalmic anatomy of a patient posterior to the cornea. The method may include scanning a focus of a femtosecond laser beam along a path within the patient's eye. A portion of the path may be disposed posterior to the patien

Embodiments of the invention provide methods and systems for analyzing the ophthalmic anatomy of a patient posterior to the cornea. The method may include scanning a focus of a femtosecond laser beam along a path within the patient's eye. A portion of the path may be disposed posterior to the patient's cornea. The method may also include acquiring a first reflectance image and a second reflectance image associated with the focus disposed respectively at a first location of the path and a second location of the path. The method may further include determining the presence or absence of an ophthalmic anatomical feature of the eye based on a comparison between the first reflectance image and the second reflectance image.

대표청구항 ▼

1. A system for treating an eye of a patient, the eye including a fluid and a tissue posterior to a cornea, the system comprising: a femtosecond laser configured for directing femtosecond energy pulses along an optical path;an optical system disposed along the optical path from the laser, the optica

1. A system for treating an eye of a patient, the eye including a fluid and a tissue posterior to a cornea, the system comprising: a femtosecond laser configured for directing femtosecond energy pulses along an optical path;an optical system disposed along the optical path from the laser, the optical system including a focusing lens and a scanner so as to scan a non-plasma-generating focus of the femtosecond energy along a scan path within the patient's eye, the scan path extending posterior to the patient's cornea within the fluid and the tissue so that the scan path includes a first location disposed within the tissue of the eye and a second location disposed within the cornea;a sensor, comprising an image acquisition device, oriented and disposed along a part of the optical path outside of the patient's eye so as to sense a first signal to form a first reflectance image associated with a first focus location within the eye, and to sense a second signal to form a second reflectance image associated with a second focus location within the eye, the first and second signals being reflectance signals of the femtosecond pulses of the laser which have a wavelength equal to that of the femtosecond pulses, which are reflected respectively by the eye at the first and second focus locations; anda computing device communicatively coupled with the sensor, wherein the computing device determines a location of an interface between the fluid and the tissue of the eye based on a comparison between a size of a focal spot in the first reflectance image formed by the first signal and a size of a focal spot in the second reflectance image formed by the second signal. 2. The system of claim 1, wherein the non-plasma-generating focus of the femtosecond energy has an energy level less than a bubble formation threshold of the fluid or the tissue of the eye. 3. The system of claim 1, wherein the sensor is configured to sense a dimension of a spot size at the focus, and wherein the computing device is configured to determine if the beam spot size is indicative of wrinkling associated with engagement between the cornea and a corneal-shaping patient interface of the system. 4. The system of claim 1, wherein the computing device is configured to determine and transmit pachymetry data for the eye. 5. The system of claim 1, wherein the computing device is configured to determine a separation between a posterior capsule and a retina of the eye. 6. The system of claim 1, wherein the computing device is configured to determine a curvature of a patient interface contact surface of the system. 7. The system of claim 1, wherein the computing device is configured to detect bubbles at a meniscus between a patient interface contact surface of the system and the eye. 8. The system of claim 1, wherein the computing device is configured to determine a location of an apex or vertex of a contact surface of a patient interface of the system.