Bishop's work is concerned both with the properties of axons, neurone cell bodies and synapses in the brain, particularly those in the visual pathways and centres, and with the nature of the central organization of vision. He is also studying, in the visual centres, the successive transformations of the impulse patterns that represent coded information transmitted from eye to brain. For this purpose he has developed a multi-beam ophthalmoscope for use in conjunction with a stereotaxic technique. His work is remarkable for the systematic precision with which he is developing the experimental attack on the whole problem of the visual pathways.