Minimal clinically visible photocoagulation burns were placed in the papillomacular bundle in monkeys. Histopathologic study performed on the treated eyes at predetermined posttreatment intervals from one day to three months revealed the nerve fiber layer to be intact in all cases.
Townes DE, Watzke RC. Xenon Photocoagulation of the Papillomacular BundleA n Experimental Study. Arch Ophthalmol. 1972;87(6):679-683. doi:10.1001/archopht.1972.01000020681013