Related Experiment Video
Updated: Nov 4, 2025
07:11
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
6.5K
Assessing migraine patients with multifocal pupillographic objective perimetry
Eman N Ali1,2, Corinne F Carle1, Christian J Lueck3,4
1Eccles Institute of Neuroscience, the John Curtin School of Medical Research, Australian National University, Acton, ACT, Australia.
BMC Neurology
|May 27, 2021
Summary
Stimulating intrinsically-photosensitive retinal ganglion cells (ipRGCs) did not alter migraine occurrence or severity. However, recent migraine attacks and triptan use impacted pupillary responses, suggesting a link between migraine and visual system function.
Area of Science:
- Ophthalmology
- Neurology
- Visual Neuroscience
Background:
- Intrinsically-photosensitive retinal ganglion cells (ipRGCs) play a role in circadian rhythms and light aversion, which can be relevant to migraine pathophysiology.
- Investigating the impact of ipRGC stimulation on migraine may reveal new therapeutic targets or diagnostic markers.
Purpose of the Study:
- To determine if stimulating ipRGCs affects migraine severity and occurrence.
- To investigate whether migraineurs exhibit objective visual field defects using pupillography.
Main Methods:
- A randomized, open-label, crossover study involving migraineurs and controls.
- Multifocal pupillographic objective perimetry (mfPOP) was used to assess pupillary responses to blue (ipRGC-stimulating) and yellow (luminance-stimulating) light.
- Migraine diaries and pupillary response analysis (amplitude, time-to-peak) were employed.
Main Results:
- Stimulating ipRGCs did not significantly alter migraine occurrence or severity in participants.
- Migraine attacks within two weeks prior to testing were associated with reduced pupillary response amplitudes.
- Triptan use was linked to increased pupillary response amplitudes.
Conclusions:
- Stimulation of ipRGCs does not appear to influence migraine occurrence or severity.
- Pupillary response characteristics are demonstrably affected by recent migraine activity and triptan medication use.
- These findings suggest a measurable impact of migraine on the visual system's pupillary light reflex.
