Cell Assay: Human umbilical vein endothelial cells (HUVECs) (1×104 cells/100 μL/well) are seeded in 96-well plates and cultured at 37 for 14 h with Endothelial Cell Medium supplemented with 5% heat-inactivated FCS, 100 U/mL Penicillin, 100 U/mL Streptomycin, and endothelial cell growth supplement. After low-serum starvation overnight, cells are treated with different concentrations of FD006 or Bevacizumab which are pre-incubated with 10 ng/mL VEGF for 30 minutes and incubated at 37, 5% CO2 for 72 hours. Then, 10 μL CCK8 is added to each well and incubated for another 4 hours. The absorbance is measured by spectrophotometer at 450 nm to determine the cell viability.

Animal Studies: After modeling, ninety rats are randomly divided into five groups (eighteen rats per group) and receive a subconjunctival injection with 0.05 mL per rat of (1) 0.9% NaCl, (2) solvent, (3) 0.1% Dexamethasone (Dexamethasone sodium phosphate), (4) 25 mg/mL Bevacizumab and (5) 25 mg/mL FD006 in the superior temporal conjunctiva on the day after modeling. All chemical burns and treatments are performed by one investigator. The operator is blinded to the treatment group from which each cornea is derived. At postoperative days 3, 7, 14, 21 and 28, the eyes are harvested for further studies after the rats are sacrificed with an overdose of 10% chloral hydrate.