Figure 3. Immunofluorescence staining of HIF-1α and VEGF in cornea at day 4 and 7 after CL wear. The arrows indicated the positive staining of HIF-1α and VEGF in the corneal epithelium of each group. A: HIF-1α expression in normal cornea. B: HIF-1α expression in cornea at day 4. C: HIF-1α expression in cornea at day 7. D, H: Control cornea at day 7. E: VEGF expression in normal cornea. F: VEGF expression in cornea at day 4. G: VEGF expression in cornea at day 7. Magnification: 400×.