Figure 1. Axonal loss in optic nerves of Thy1-CFP mice at various intervals after crush injury. A: Control optic nerve; no damage. Note the absence of damage to the optic nerve. B: Four days after crush injury; 30% axonal loss can be detected. C: Fourteen days after crush injury; maximal (75%) axonal loss is seen. Note the central loss of Thy1-CFP-labeled axons.