Long description of figure 2

Illustrationof optical system, showing the light path from the eye to a quarter wave plate to a mirror to lenses 5, 4, and 3, to a polarized beam splitter to a corneal stop to a retinal stop to lens 6 to a mirror to a photodetector to the Oculix LDF 4000 data acquisiton unit to a laptop PC and from the polarized beam splitter to the pupil to a pinhole to lenses 2 and 1 and to a laser diode.

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