Photographic assessment of the optic disc.

Increasing the sensitivity of methods of examining the visual field may merely increase subjective errors already inherent in this test. The optic disc can be examined quite objectively and subtle changes are best assessed by photography. A method, evolved through trial and error, is outlined for obtaining high quality colour transparencies and Polaroid Land Prints of the optic disc for follow up. Routine disc photography should be an important part of a glaucoma record.