Lidocaine, with and without supplementary epinephrine and hyaluronidase, was injected into the retrobulbar area in experimental cats. The evoked optic nerve potentials were then measured after "supramaximal" photostimulation.
PRUETT RC. The Effects of Local Anesthetics Upon Optic Nerve Conduction in the Cat. Arch Ophthalmol. 1967;77(1):119–123. doi:10.1001/archopht.1967.00980020121026
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