1. Bracher D, Dozzi M, Lotmar W (1979) Measurement of vessel width on fundus photographs. Graefe's Arch Clin Exp Ophthalmol 211:35–48
2. Brinchmann-Hansen O, Heier H, Myhre K (1986) Fundus photography of width and intensity profiles of the blood column and the light reflex in retinal vessels. Acta Ophthalmol (Copenh) [Suppl] 179:20–28
3. Charman WN, Watrasiewicz BM (1964) Mach effect associated with microscope images. J Opt Soc Am 54:791–795
4. Delori FC, Gragoudas ES, Francisco R, Pruett RC (1977) Monochromatic ophthalmoscopy and fundus photography: the normal fundus. Arch Ophthalmol 95:861–868
5. Delori FC, Rogers FJ, Bursell SE, Parker JS (1982) A system for non-invasive oximetry of retinal vessels. In: Potvin AR, Potvin JH (eds) Frontiers of engineering in health care — 1982. Proceedings of the 4th Annual Conference of the IEEE Engineering in Medicine and Biology Society, Philadelphia, 1982. Institute of Electrical and Electronics Engineers, New York, pp 296–299