bidirectional laser doppler velocimetry and monochromatic fundus photography were used to investigate retinal circulation in 26 normal subjects and in 51 insulin-treated diabetic patients with no retinopathy , background retinopathy ( bdr ) , proliferative retinopathy ( pdr ) , and patients with pdr who had been treated by panretinal photocoagulation ( pdr-prp ) .
C0035298
retinal
C0154830
pdr