Rare diseases · Sign or symptom
Decreased light- and dark-adapted electroretinogram amplitude
HP:0000654
What it means
Decreased amplitude of eletrical response upon electroretinography.
Rare diseases that can present with this1
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Decreased amplitudes on flash visual electroretinogram · Decreased electroretinogram · Decreased electroretinogram amplitude · Decreased electroretinogram response · Decreased ERG amplitude · Flattened or absent electroretinogram · Reduced electroretinogram · Reduced ERG
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.