Surgical visual feedback and eye fixation method and apparatus
a visual feedback and eye fixation technology, applied in the field of eye fixation, can solve the problems of not providing the best alignment of the eye and the laser beam, not providing visual feedback for the operator, and the axis of astigmatism of the patient's eye is also likely to be misaligned, so as to facilitate the alignment of an instrumen
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[0056]Referring to FIGS. 1 and 2, there is presented a schematic view of a patient's eye fixation apparatus 10 according to a preferred embodiment of the present invention. The apparatus 10 includes a fixation target in the form of a cross 12 formed by surface mounted light emitting diodes, LEDs 14, arranged in two linear arrays to define intersecting elongate components or axes 16, 18 perpendicular to one another. The LEDs are fixed to a printed circuit board (PCB) 13, in turn arranged on an elongate lipped substrate 15. Substrate 15 is positioned on the front of the surgical microscope 28, symmetrically between the adjacent stereo oculars 40,42, so as to be clearly observable by the patient. Alternatively, cross 12 may be located elsewhere within the surgical laser, and projected to optically appear as if it is placed between the oculars of the microscope.
[0057]Substrate 15 is fixed in position on the microscope so that cross 12 has a fixed orientation. “Vertical” axis 16 of the c...
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