Rare diseases · Sign or symptom
Slow saccadic eye movements
Slow eye movements
HP:0000514
What it means
An abnormally slow velocity of the saccadic eye movements.
Saccades are rapid eye movements that align the fovea with the target.
Rare diseases that can present with this17
Common30–79%
11- Ataxia-telangiectasia-like disorder
- Autosomal dominant spastic ataxia type 1
- Classic progressive supranuclear palsy syndrome
- Parkinsonian-pyramidal syndrome
- Progressive supranuclear palsy
- Spinocerebellar ataxia type 1
- Spinocerebellar ataxia type 2
- Spinocerebellar ataxia type 23
- Spinocerebellar ataxia type 28
- Spinocerebellar ataxia type 36
- Spinocerebellar ataxia type 38
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: Slow saccades · Slow visual tracking
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.