Immunoelectrophoresis of tears yielded seven visible components. These were identified with specific antisera as specific tear prealbumin, serum albumin, ceruloplasmin, transferrin, IgA, IgG, and lysozyme. Specific tear prealbumin is a unique tear component. Tear IgA has a specific antigenic moiety not present in serum IgA. The importance of these seven proteins is discussed.
Sapse AT, Bonavida B, Stone W, Sercarz EE. Proteins in Human Tears: I. Immunoelectrophoretic Patterns. Arch Ophthalmol. 1969;81(6):815–819. doi:10.1001/archopht.1969.00990010817012
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