Fig. 4

Vitreoretinal appearance after BMSC injection by a series of concentrations. a Cell concentration at 1 × 10⁸ cells/ml resulted in severe retinal traction and proliferation in the vitreous. b Traction and proliferation reduced when the cell concentration was adjusted to 5 × 10⁷ cells/ml. c Vitreoretinal appearance was improved at 1 × 10⁷ cells/ml, but mild traction and proliferation still existed. d Traction and proliferation disappeared when tapering to 5 × 10⁶ cells/ml