After determining the effective t-PA dosage (25ug t-PA), six experimented eyes with PVR degree B and six experimented eyes with PVR degree C were treated with 25ugt-PA.

• 筛选出有效药物浓度组（25ugt-PA）后，再选择PVR动物模型达2级的6只兔子，达3级的6只兔子，实验眼玻璃体腔内分别注入25ugt-PA。