An experimental instrument for examining permeability of a flowing cornea is used for imitating a lacrimal layer in the front part of a cornea or the back part of the cornea (an aqueous humor) by means of storing a various kinds of solutions comprises a cell body including a stirring part of a cylindrical wall and a bottom surface at a bottom part thereof, a constant temperature tank which surrounds the cell body all around a sample membrane setting part which is protrusively arranged at an outer surface of the call body and can set a sample membrane such as a contact lens used as a cornea or a corneal model, an outflow tube which is protrusively arranged at an outer surface of the stirring part and makes a solution in the cell body discharge, an inflow tube which is protrusively arranged at an upper part of the cell body and makes the solution flow inside of the cell body, a magnet rotator which is arranged inside the stirring part of the cell body, and a magnet stirrer which makes the magnet rotator inside the cell body rotate by means of magnetic force.
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