Compositions and preparations of fetal support tissue that prevent or reduce the proliferation and epithelial-mesenchymal transition (EMT) of epithelial cells, wherein the epithelial cells may be human epithelial cells and the human epithelial cells may be conjunctival, retinal, corneal, limbal, or renal epithelial cells. Methods of preventing or reducing the proliferation, cell migration, and EMT of epithelial cells in an individual in need thereof, wherein the epithelial cells may be human epithelial cells and the human epithelial cells may be conjunctival, retinal, corneal, limbal, or renal epithelial cells. Methods of preventing or treating proliferative vitreoretinopathy in an individual in need thereof.
