Interocular transfer of labeled human serum albumin was demonstrated in rabbits following its instillation into one conjunctival sac. Such interocular molecular transfer follows a nonhematogenous pathway.
P. R. Jensen, S. B. Aronson, M. Pollycove, E. Yamamoto. Mechanisms of Host Response in the EyeIII. Interocular Protein Transfer. Arch Ophthalmol. 1967;77(6):814–817. doi:10.1001/archopht.1967.00980020816021