Abstract: A surface treatment laser beam delivery and tracking system is provided. The laser generates laser light along a original beam path at an energy level suitable for treating (e.g., eroding) a surface. An optical translator shifts the original beam path onto a resulting beam path. An optical angle adjuster changes the angle of the resulting beam path relative to the original beam path such that the laser light is incident on, and spatially distributed, the surface to be treated. A motion sensor transmits light energy to the surface and receives reflected light energy from the surface via the optical angle adjuster. The light energy transmitted by the motion sensor travels on a path that is parallel to the shifted beam as they travel through the optical angle adjuster. The reflected light energy is used by the motion sensor to detect movement of the surface relative to the original beam path and generate error control signals indicative of the movement.

Abstract: A surface treatment laser beam delivery and tracking system is provided. The laser generates laser light along a original beam path at an energy level suitable for treating (e.g., eroding) a surface. An optical translator shifts the original beam path onto a resulting beam path. An optical angle adjuster changes the angle of the resulting beam path relative to the original beam path such that the laser light is incident on, and spatially distributed, the surface to be treated. A motion sensor transmits light energy to the surface and receives reflected light energy from the surface via the optical angle adjuster. The light energy transmitted by the motion sensor travels on a path that is parallel to the shifted beam as they travel through the optical angle adjuster. The reflected light energy is used by the motion sensor to detect movement of the surface relative to the original beam path and generate error control signals indicative of the movement.

Abstract: A system is provided for use with an ophthalmic treatment laser that produces a treatment laser beam. The system automatically inhibits transmission of the treatment laser beam when a threshold amount of eye movement is detected. An eye movement sensor determines measurable amounts of eye movement such as saccadic eye movement. The eye movement sensor generates light energy that is eye safe, focuses the light energy on the eye, and detects energy reflected from the eye due to the incident light energy. The eye movement sensor determines the measurable amount of eye movement based on changes in the reflected energy. A dichroic beamsplitter is optically disposed between the ophthalmic treatment laser and the eye to direct the treatment laser beam to the eye. The beamsplitter is also optically disposed between the eye movement sensor and the eye to direct the sensor's light energy to the eye and the resulting reflected energy back to the sensor.

Abstract: A method and system are provided for sensing eye movement, such as saccadic eye movement, in a non-intrusive fashion. An optical delivery arrangement converts a laser beam pulse into a plurality of light spots. The light spots are focused such that they are incident on a corresponding plurality of positions located on a boundary whose movement is coincident with that of eye movement. The boundary can be defined by two visually adjoining surfaces having different coefficients of reflection. Energy is reflected from each of the positions located on the boundary receiving the light spots. An optical receiving arrangement detects the reflected energy from each of the positions. Changes in reflected energy at one or more of the positions is indicative of eye movement.

Abstract: A biofeedback method and system provide eye position feedback to a patient. A first light source produces a ring of visible light centered about an optical axis at a perceived first position. A second light source produces a dot of visible light centered on the same optical axis as that of the ring at a perceived second position. As perceived by the eye, the ring's first position is closer to the eye than the dot's second position. The eye will further perceive the dot as being centered in the ring when the eye moves its visual axis into spatial and angular alignment with the optical axis shared by the dot and ring. An eye movement sensor detects a quantifiable amount of eye movement to generate an error signal. The error signal is supplied to the second light source to adjust the dot's appearance whenever the patient needs to realign the eye's visual axis with the optical axis of the dot and the ring.