Eighteen sets of electroretinograms (ERGs) were recorded from ten patients who had been patched for various periods for the treatment of amblyopia. In all cases, the amplitude of the b-wave was smaller in the patched eye. The depression of the b-wave was temporary and recovery occurred after the patching was discontinued.
Hamasaki DI, Flynn JT. Depression of ERG After Patching. Arch Ophthalmol. 1973;89(6):472-475. doi:10.1001/archopht.1973.01000040474005