Figure 2. Retina preparation by fluorescein isothiocyanate-dextran heart perfusion. A: The image of rat retinal angiography in the positive control group under a fluorescent microscope. Tortuous and thick abnormal new vessels were seen. B: The image of rat retinal angiography in the positive control group under fluorescent microscope. Fluorescent leakage of new vessel mass was seen. C: The image of rat retinal angiography in the gene interference group under a fluorescent microscope. Vessels were distributed in a disorganized manner. D: The image of rat retinal angiography in the gene interference group under a fluorescent microscope. Tortuous and thick new vessels were found. E: The image of rat retinal angiography in the gene interference group under a fluorescent microscope. Two layers of retinal vessels in normal distribution. F: The image of rat retinal angiography in the gene interference group under a fluorescent microscope. Deep vessels were normally arranged as a net.