Retinal photography using panchromatic and orthochromatic films.

Much has been written about fundus photography and the efforts to obtain better results by the use of different cameras and filters, but little mention has been made of the choice of film. Drews (I957) showed that the chromatic abberrations of the optical systems of the patient and camera could be largely eliminated by use of a monochromatic light source. Behrendt and Wilson (i965), and Behrendt and Duane (I966) introduced the concept of retinal spectral reflectance photography, using various interference filters and comparing the negatives obtained at a specified wavelength.