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A dDPI prototype. (A) General architecture and (B) hardware implementation. Infrared light from the source (S) is collimated (lens L1). The beam is directed toward the eye via a dichroic mirror. Purkinje reflections are acquired by a high-speed camera (C) equipped with a long-pass filter (F). The camera lens (L2) relays the plane of the Purkinje images P to the sensor plane P′. (C) List of components in the prototype tested in this study.
