- Symbols: nD, n = 0,1,3: spatial dimensions of the model; V = vitreous, R = retina, C = choroid, S = sclera. a: treated with an addictional fictitious advective term; b: treated with different inward and outward membrane permeabilities. Merged cells in a row indicate that the corresponding domains are treated as a sole entity. Interface boundary conditions are checked when a Robin-type boundary conditions with a specific membrane permeability is used for drug at interface; c: a partition coefficient is considered at the interface; d: Navier-Stokes equations are considered.