[In vivo biomicroscopy of the human lens]

The human lens was observed in vivo by a specular microscope and specially designed cone contact lens. The lens fibers of central part of the anterior cortex were photographed and their widths measured in 16 healthy normal males in the third and fourth decades of life. The average width of the fibers was 12.35 +/- 1.17 microns and 12.36 +/- 0.80 microns. There was no statistically significant difference in average width between the two groups when the objectives were divided by their age in twenties and thirties.