Coyle J T, Milam D F
Am J Ophthalmol. 1977 Jun;83(6):923-4. doi: 10.1016/0002-9394(77)90926-6.
A T-shaped carrier with twin test objects is an inexpensive efficient visual field screening device which facilitated identification of a nasal steppe, a paracentral scotoma, an enlarged blind spot, an arcuate scotoma, macular sparing, or hemianopic defects.
带有双测试对象的T形载体是一种廉价高效的视野筛查设备，有助于识别鼻侧阶梯、旁中心暗点、扩大的盲点、弓形暗点、黄斑回避或偏盲缺陷。
