in 169 out of 409 diabetic patients without any ophthalmoscopically or biomicroscopically visible retinal changes , typical symptoms of diabetic pre-retinopathy were revealed by fluorescein angiography : capillary dilatation ( 89.3 % ) , capillary occlusion ( 78.7 % ) , leakage from small blood vessels ( 54.4 % ) and arteriovenous shunts ( 40.8 % ) .
C0035298
retinal
C0011884
diabetic