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Updated: Jan 25, 2026
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Eye Movement Monitoring of Memory
Published on: August 15, 2010
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Rapid eye movements are reduced in blind individuals
Julie A E Christensen1,2, Sébrina Aubin3,4,5, Tore Nielsen6
1Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Rigshospitalet, Glostrup, Denmark.
Journal of Sleep Research
|April 27, 2019
Summary
Rapid eye movements (EMs) during REM sleep may not indicate visual dream content. Blind individuals show fewer EMs, yet late-blind subjects report visual dreams, suggesting a dissociation.
Area of Science:
- Neuroscience
- Sleep Science
- Ophthalmology
Background:
- Rapid eye movements (EMs) during REM sleep are hypothesized to reflect visual imagery during dreams.
- The relationship between EMs and visual dream content remains controversial, particularly in individuals with blindness.
Purpose of the Study:
- To investigate the association between EMs during REM sleep and visual dream content in blind individuals.
- To test the visual scanning hypothesis of dreams by examining EMs in congenitally blind and late-blind participants.
Main Methods:
- Full-night polysomnography (PSG) was used to record sleep stages and detect EMs in blind (congenitally and late-blind) and sighted control subjects.
- EM activity was quantified as EM coverage (percentage of time with EMs during each sleep stage).
- Dream content was assessed over 30 days using questionnaires focusing on sensory dream elements.
Main Results:
- Both congenitally blind and late-blind subjects exhibited reduced EM coverage across sleep stages compared to sighted controls.
- Late-blind subjects reported significantly more visual dream elements than congenitally blind subjects.
- A dissociation was observed between the quasi-absence of EMs and the presence of visual dream content in late-blind individuals.
Conclusions:
- The findings do not support the hypothesis that EMs during REM sleep directly correlate with visual dream content.
- Results suggest a potential dissociation between EMs and visual dream experiences in blind individuals.
- Further research is needed to elucidate the mechanisms underlying dream generation and sensory experiences in blindness.
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