Answers are grounded in this paper and cite their sources.
Misclassification between lower grades of retinopathy is not uncommon but is unlikely to lead to significant delays in referring people for sight-threatening retinopathy.
No takes yet. Share an insight, caveat, or question.
Oke et al. (2015) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: