Binocular indirect ophthalmoscopy (BIO) is fundamental for screening of retinopathy of prematurity (ROP). Digital retinal imaging devices with fluorescein angiography (FA) proved to be useful in screening and management of ROP. FA provides valuable additional information that is not detectable through ophthalmoscopy. FA images are relatively easy to interpret even by personnel without specific experience in ROP. The aim of this study is to evaluate reproducibility of FA for the screening and follow-up of ROP. A total of 106 pairs of FA images of 30 eyes of 15 premature infants with stage II ROP were evaluated by 5 ophthalmologists: 2 experts, 2 non-experts, and 1 expert in reading FA in adult patients. Each operator gave a score to each of following parameters: leakage, ischemic areas, peripheral plus disease and vascular anomalies. The images were reviewed twice. Intra- and inter-concordance between the readers of the FA findings was evaluated by the means of Cohen's kappa coefficient (κ). The intra-operator concordance was very good (κ > 0.81) for all FA findings. Inter-operator concordance was good (κ > 0.41) for all operators and all FA findings. Global concordance was: substantial (intra–inter readers: κ > 0.61) for leakage, ischemic areas, and plus disease; almost perfect (κ > 0.81) for vascular anomalies; and moderate (κ = 0.41–0.60) for continuity/discontinuity of the ischemic areas. Total FA score was directly correlated to the percentage of treatment: a score ≥ 7 was correlated with 100% treatment and a score ≤ 3 with no treatment. Treatment timing was inversely correlated to FA score: a score ≥ 8 was correlated with a timely treatment (≤ 6 days), and a score ≤ 7 was correlated with a delayed treatment (
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