Related Experiment Video
Updated: Mar 25, 2026
07:24
Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
Published on: August 22, 2025
625
Upbeat nystagmus in a 3.5-year-old boy
Jyoti Matalia1, Vimal K Rajput1, Geetanjali J Chillal1
1Department of Pediatric Ophthalmology, Narayana Nethralaya-2, Bengaluru, India.
Summary
Upbeat nystagmus in a 3.5-year-old boy resolved spontaneously, converting to horizontal nystagmus. This case highlights cone dysfunction as a potential cause of transient upbeat nystagmus in children.
Area of Science:
- Ophthalmology
- Neurology
- Genetics
Background:
- Upbeat nystagmus (UBN) typically indicates central nervous system lesions.
- In children, UBN can be transient in neonates or sensory, often converting to horizontal nystagmus by age two.
Observation:
- A 3.5-year-old boy presented with upbeat nystagmus.
- Ocular and neurological examinations were normal.
- Optical coherence tomography and electroretinogram revealed cone dysfunction.
Findings:
- The patient's upbeat nystagmus transformed into horizontal nystagmus over six months.
- This suggests a potential link between cone dysfunction and transient UBN in children.
Implications:
- This case expands the understanding of UBN etiology in pediatric patients.
- It suggests that sensory nystagmus due to cone dysfunction may present as transient UBN.
- Further research into the neuro-ophthalmic manifestations of cone dysfunction is warranted.
