high doses of 4-methylpyrazole ( 4-mp ) could be administered to monkeys in long- and short-term experiments without yielding any general toxicity or any toxic influence on the retinal photoreceptors , the conduction of impulses through the retina or on the activity in the inner nuclear layer detectable by recording the electroretinogram ( erg ) .
C0035298
retina
C1512784
inner nuclear layer