Fig. 7From: Liquid Crystalline Nanoparticles as an Ophthalmic Delivery System for Tetrandrine: Development, Characterization, and In Vitro and In Vivo EvaluationPre-ocular retention of various formulations (n = 3). Remaining intensity (R) was calculated according to the equation: R = (A − B)/C × 100 %, where A was the intensity of ROI, B was the background fluorescence intensity, and C was the intensity of ROI at 0 minBack to article page