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The central light reflex of retinal arteries and veins in insulin‐dependent diabetic subjects
Author(s) -
BrinchmannHansen Olaf,
Myhre Kjell,
DahlJørgensen Knut,
Hanssen Kristian F.,
Sandvik Leiv
Publication year - 1987
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.1755-3768.1987.tb07026.x
Subject(s) - medicine , diabetic retinopathy , retinal , diabetes mellitus , hemodynamics , fundus (uterus) , reflex , ophthalmology , blood flow , central retinal artery , intensity (physics) , retina , insulin , blood pressure , cardiology , endocrinology , biology , physics , quantum mechanics , neuroscience
The width (Wr/Wo) and the intensity (Ir) of the central light reflex were studied on retinal arteries and veins in insulin‐dependent diabetic patients. A diabetic group (n = 45) was compared to normal subjects (n = 57), and the groups were matched according to age and blood pressure levels. A computerized scanning microdensitometer was applied across various sites on vessels in fundus photographs. The Ir of the reflected light was significantly reduced in diabetic arteries and veins compared to the vessels in the control group ( P < 0.001). This may implicate abnormalities in blood rheology of the retinal circulation in diabetes. The Wr/Wo was found narrower in veins in diabetic patients ( P < 0.001). This probably indicates differences in haemodynamics of venous flow in diabetic and normal subjects. The intensity was correlated to the duration of diabetes ( P < 0.05), while neither the width nor the intensity were found related to sex, metabolic control, intraocular pressure or retinopathy.