The 1973 - postgraduate courses in ophthalmology held under the auspices of the Netherlands Ophthalmological Society, mark the 25th anniversary of the rebuilt Rotterdam Eye Clinic. The themes set for these courses: 'Ophthalmic Photography', 'Electro- ophthalmology' and 'Echo-ophthalmology', have been chosen from a multitude of rapid developments in ophthalmology during this period. The aim was to provide the clinician with a lead in a bewildering field of apparatus and techniques and to help him in selecting methods that provide useful results without too much specialised knowledge. However,...