The mean total macular thickness and volume only of PSP patients (302±5.0 μm; 0.95±0.02 mm 3 ) presented a significant reduction compared to both controls (318.2±2.82 μm; 1.02±0.01 mm 3 ) and PD patients (317.5±2.6 μm; 1.01+−0.01 mm 3 ) while the reduction observed in MSA (306.6±4.2 μm; 0.98±0.01 mm 3 ) and CBS (311.5±3.3 μm; 1.00±0.01 mm 3 ) failed to reach significance ( figure 1C , volume not shown).
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