Fig. 2.

Concentration of ${\mathrm{Al}}_2{\mathrm{O}}_3$ particles scale linearly with magnitude of scattering over a physiological range. Here each grit-size distribution of ${\mathrm{Al}}_2{\mathrm{O}}_3$ particles was fabricated and measured at three concentrations (based on mass/100 ml PDMS). The reduced scattering values at 650 nm are reported here.