Measuring Hemoglobin Levels in the Optic Disc of Parkinson’s Disease Patients Using New Colorimetric Analysis Software

Figure 2

Examples of papillary images in a healthy subject (left column) and a Parkinson’s disease patient (right column). Upper images show the color fundus photographs of the optic discs (the white arrow marks the papilla of a healthy subject, and the black arrow marks the papilla of a Parkinson’s disease patient). The main parts of a healthy optic nerve can be distinguished in the upper-left image (white arrow): a small “yellow-white” depression is formed in the center of the papilla, which is referred to as the optic cup, to contrast it with the “orange” surrounding neural tissue that is referred to as the neuroretinal rim. Lower images show the corresponding pseudoimages representing the amount of hemoglobin. The colorimetric scale at the right side of the lower images shows the amount of hemoglobin.

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