Figure 1. Macroscopic observation of corneal neovascularization in PSP-treated and control mice. PSP (100 μg/ml) or solvent control was used topically 4 times everyday on alkali-injured mice cornea for 7 days, images were taken with slit lamp. It can been seen clearly that in control group without PSP treated, the new vessel is predominant in conea, however which is very slight in cornea treated with PSP.