FIG. 9.

Dilution of vesicle suspension changes how well the suspension focuses. The least focused suspension has a volume fraction $\left(\varphi \right)\mathrm{o}\mathrm{f}\hspace{0.17em}(\mathrm{a})\hspace{0.17em}\approx 10\%$ and (b) $\varphi \approx 6\%$. (c) The best focusing behavior observed with $\varphi \approx 2\%$.