The Bjerrum area in ocular hypertension.

of fresh defects (Fig. 7). If the occurrence of maximal defects were the only sequence occurring in glaucoma then the chances of finding reversible and predictive signs in the visual field would be small and unlikely, but the early incomplete evidence, such as we have at this time, suggests that established defects do undergo change; this gives us hope that by employing more sophisticated physiological parameters of visual function such as spatial, temporal summation, size of receptive field, and their change with states of adaptation may lead to a reliable predictor during a reversible stage. This is being investigated at this time in our laboratories and clinics.