Fig. 6.

Effect of varying PVA proportion (a) and PF-68 proportion (b) on the characteristics of Eudragit-based brimonidine tartrate nanoparticle formulations. Each data represents the average of two batches in triplicate with standard deviation. *Statistically significant difference from PVA conc. of 0.5% w/v (p < 0.0001). **Statistically significant difference from PVA conc. of 0.5% w/v (p < 0.01). ^#Statistically significant difference from PF conc. of 0.5% w/v (p < 0.001). ^##Statistically significant difference from PF conc. of 0.5% w/v (p < 0.0001)