PROBLEM TO BE SOLVED: To provide a sequential wave-front sensor having large dynamic range for orthoptic technique or evaluation technique.SOLUTION: At somewhere in a relay process, in a manner that wave-front beam from an eye in a large eye diopter range is within a preferable physical size ranging in a specific axis distance range in a wave-front image space and/or a Fourier transformation space, the wave-front is optically relaid from a pupil surface or a cornea surface to a wave-front sampling surface. In order to shift the relaid wave-front to a transverse direction, a wave-front beam shifting apparatus 212 is arranged so that the whole beam is completely intercepted and then shifted.SELECTED DRAWING: Figure 2
REAL-TIME SEQUENTIAL WAVE-FRONT SENSOR HAVING LARGE DIOPTER RANGE