Electroretinogram (ERG) and visual evoked potential (VEP) were taken two days before, and 3 h, 1, 3, 7, 14, 21 and 28 days after the establishment of HRD.

• 于HRD建立前 2d ；建立后 3h ；1；3；7；14 ；2 1和 2 8d行视网膜电图 (electroretinogram ；ERG)和视觉诱发电位 (visualevokedpotential；VEP)检查 .