Retinal nerve fibre layer photography with a wide angle fundus camera.

Retinal nerve fibre layer (RNFL) photographs taken with a wide-angle fundus camera (Canon CF-60Z) and its built-in blue interference filter (SE-40) of 495 nm wavelength were compared with pictures taken with the same camera and a red-free absorption filter (Wratten No. 58) as well as with photographs taken with a 30 degrees fundus camera and Wratten No. 58 filter. Comparison showed that the best visualisation of the RNFL and its defects was achieved with the 60 degrees picture angle of the Canon camera and SE-40 filter. With a smaller picture angle (30 degrees) and a filter of longer wavelength quality of reproduction deteriorated.