Poloschek Charlotte M, Sutter Erich E
The Smith-Kettlewell Eye Research Institute, San Francisco, California, USA.
J Vis. 2002;2(8):577-87. doi: 10.1167/2.8.5.
The multifocal electroretinogram (mfERG) allows for functional field mapping by concurrently deriving responses from a large number of retinal locations. The stimulus resolution most commonly used consists of 103 hexagonal elements. Here, we stimulated with an array of 509 elements. To determine the extent to which the multifocal ERG shows anatomical and physiological details, such as shadows cast by the retinal vasculature, we obtained mfERGs from two subjects using two different stimulus luminance levels and three light spectra. Good correspondence of some depressions with major blood vessels suggests relative angioscotomata. However, some reproducible local depressions cannot be attributed to blood vessel shadows cast on the retina, but more likely reflect local inhomogeneities in the physiological response characteristics.
多焦视网膜电图（mfERG）通过同时从大量视网膜位置获取反应，实现功能视野映射。最常用的刺激分辨率由103个六边形单元组成。在此，我们使用了509个单元的阵列进行刺激。为了确定多焦视网膜电图显示解剖和生理细节（如视网膜血管投射的阴影）的程度，我们使用两种不同的刺激亮度水平和三种光谱，从两名受试者获取了mfERG。一些凹陷与主要血管的良好对应表明存在相对暗点。然而，一些可重复的局部凹陷不能归因于投射在视网膜上的血管阴影，而更可能反映了生理反应特征中的局部不均匀性。
