Hirschberg presented five g1ass-blowers, over forty years of age, who had acquired opacities of the lens. He attributes the formation of the cataract to the continued heat. The opacity appears in the posterior layers of the lens, and progresses slowly.
Reference:Arch Ophthalmol. 1898;27:663.
A look at the past . . .. Arch Ophthalmol. 2000;118(9):1210. doi:10.1001/archopht.118.9.1210