Image size in the fundus: structural evidence for wide-field retinal magnification factor.
A simple geometrical method is described of calculating the retinal magnification factor (micrometres/degree) at the ora serrata of the human eye. At the ora the magnification factor is some 176 microns/deg., whereas at the posterior pole it is 276 microns/deg. This result may be of clinical use in examinations where dimensions of tears and holes near the ora serrata are estimated.
Holden
A L
AL
Department of Visual Science, Institute of Ophthalmology, London.
Fitzke
F W
FW
D006801:Humans; D008722:Methods; D008954:Models, Biological; D055095:Optics and Photonics; D012160:Retina / Q000473:pathology / Q000502:physiology*; D012167:Retinal Perforations / Q000473:pathology; D014794:Visual Fields