Fig. 3
From: Magnetic micropump embedded in contact lens for on-demand drug delivery
a The sequential images show the drug release process of the proposed magnetic micropump with a short exposure (less than 1 s) of magnetic field (469 mT), including the valve opening, the drug release, and the drug diffusion. b The quantitative evaluation of the drug release according to the strength of the magnetic field from 152 to 469 mT. Error bars indicate the standard deviation (n = 10)