… as these mfPERG findings suggest:

Bach M, Cuno AK, Hoffmann Michael Bach (2018) Retinal conduction speed analysis reveals different origins of the P50 and N95 components of the (multifocal) pattern electroretinogram. Exp Eye Res 169:48–53.

Currently it is a free download here

https://authors.elsevier.com/a/1WVTB_L4uVOiC