The Marton Lecture: ultrasound in ophthalmic optics.

A personal tribute to H. B. Marton is given, together with an outline of some of his achievements. The use of ultrasound for visualization through optically opaque areas due to various abnormal ocular conditions is described. Measurement of the eye with its relationship to refraction and the calculation of the power of a lens implant is considered. The help that ultrasonography can offer to the ophthalmic optician is illustrated with A- and B-scan traces.