The change of light projection also reveals that there were visual field defects after retrobulbar anesthesia.另外从光投射的变化，证实有视野缺陷产生。
We examined 30 patients for visual acuity, ocular motility, and light projection before and after retrobulbar anesthesia本篇报告30位（30眼）接受白内障手术的病人，手术前施行球后麻醉之后视力降低的情形。