Vogt's retro-iridian pigment lines. Light microscopical and ultrastructural study of a case

A woman, aged 69, with latent diabetes was found to have retro-iridian pigment lines. Cataract extraction was followed by light microscopy and electron microscopy. Cross sections of the pigment lines showed these to consist of two main constituents, whose structures are described. The portion of the lines closest to the lens had a certain resemblance to the substance seen on the lens and in the iris in pseudo-exfoliation, while the remaining part of the pigment lines consisted of uniform microtubules.