Diagnostic evaluation and therapeutic decision in the glaucomas.

Some of the technical difficulties could be overcome in the group of patients under 40 years old whose pressures were in the upper 20s and 30s but who had a normal disc. Dr. Spaeth had investigated about 500 cases and felt he had reasonable technical results in about one out of three of the patients with established glaucoma in the older age groups. He also felt that there should be at least a 2-second difference between the arm-to-retina circulation time and the arm-to-choroid circulation time for the phenomenon of reversal to be significant. However, Mr. S. S. Hayreh had seen filling of the choroidal circulation after the retinal circulation at longer intervals than this in perfectlynormal eyes, andsaid that, so far, the methodwas unproven and required further investigation.