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RELIABILITY OF PHOTOMETRIC MEASUREMENTS IN THE ZEISS FUNDUS CAMERA
Author(s) -
FONDA SERGIO,
GATTI ANTONIETTA M.,
VECCHI DEANNA
Publication year - 1983
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1983.tb01395.x
Subject(s) - fundus camera , fundus (uterus) , optics , reliability (semiconductor) , computer science , retinal , computer vision , artificial intelligence , optometry , retina , ophthalmology , medicine , ophthalmoscopy , physics , power (physics) , quantum mechanics
The authors test the hypothesis of systematic errors in photometric and/or densitometrc measurements performed by Fundus camera equipment. By means of 2 different methods (reflection and transmission) the non‐uniformity of light‐distribution on sample surfaces placed in front of the fundus camera is shown. The consequent point by point variability in retinal illumination can be defined as the ‘retinal shading problem’. This conclusion must be taken into account when equidensitometric measurements are carried out on eye fundus images with fundus camera, by photographic, cinematographic or TV techniques.