1. When a patient applies an eye drop for the treatment of glaucoma, the eye drop is transported to the tear system by a thin tear film. The eye drop diffuses to the eye at 25C, through a thin tear film layer thickness of 0.07mm, and the concentration of the eye drop in the tear (point 1) and the other boundary of the tear film (point 2) is 34wt% (density 1= 840kg/m3 ) and 9wt%( density l=1030kg/m3 ), respectively. The diffusivity of eye drops in tears is 0.41109m2/s. Assuming a steady state and one boundary impermeable to tear, calculate the rate of diffusion of eye drop across a film. The molecular weight of the eye drop and tear is 320kg/kmol and 235kg/kmol, respectively. (20p) 1. When a patient applies an eye drop for the treatment of glaucoma, the eye drop is transported to the tear system by a thin tear film. The eye drop diffuses to the eye at 25C, through a thin tear film layer thickness of 0.07mm, and the concentration of the eye drop in the tear (point 1) and the other boundary of the tear film (point 2) is 34wt% (density 1= 840kg/m3 ) and 9wt%( density l=1030kg/m3 ), respectively. The diffusivity of eye drops in tears is 0.41109m2/s. Assuming a steady state and one boundary impermeable to tear, calculate the rate of diffusion of eye drop across a film. The molecular weight of the eye drop and tear is 320kg/kmol and 235kg/kmol, respectively. (20p)