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. Author manuscript; available in PMC: 2021 Nov 10.
Published in final edited form as: Int J Pharm. 2021 Jul 26;607:120924. doi: 10.1016/j.ijpharm.2021.120924

Fig. 6.

Fig. 6.

Mechanism of action of mucus penetrating particles (MPP) compared with conventional topical eye drops (Langer and Chen, 2014). Traditional suspension eye drops rapidly clear via blinking on the tear film. MPPs particles diffuse through the tear film into the membrane-bound mucin and ocular surface to reach target tissue. Image Courtesy of Kala Pharmaceuticals.