Units in Visual Science

• Units in Photometry - light measurements (Ft-L, cd/m2, trolands, photons..)

• Units in Contrast - signal magnitude (periodic, aperiodic, decibel...)

• Units in Retinal Space - (visual angle, mm in human, mm in cat, cones in human...)

• Units in Velocity - (um/msec...m/sec)

• Units in basic Electrical Circuits - (Volts, Farads, Siemens...)

• University of Chicago's common measures - (10^6 -> Million, metric, English)

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Lance Hahn(lance@retina.anatomy.upenn.edu)