Table 1

Coefficient of variation (CV) and intraclass correlation coefficients (κ) for measurements of venous and arterial diameters with the Zeiss retinal vessel analyser and measurements of retinal leucocyte flow with the blue field entoptic technique. Data are presented for short term and day to day variability

Short term variabilityDay to day variability
Venous diameter1.3 %0.984.4 %0.90
Arterial diameter2.6 %0.965.2 %0.87
Retinal blood flow11.4 %0.8317.6 %0.64