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See clearly: suggestion, hypnosis, attention, and visual acuity
Amir Raz1, Gerald P Marinoff, Zohar R Zephrani
1Columbia University and New York State Psychiatric Institute, Department of Psychiatry, New York 10032, USA. ar2241@columbia.edu
Summary
Positive suggestion and hypnosis are unlikely to significantly improve myopia or visual acuity. Any apparent effects are likely due to changes in attention, not a direct impact on vision itself.
Area of Science:
- Ophthalmology
- Neuroscience
- Cognitive Psychology
Background:
- Reports suggest hypnosis and suggestion can improve visual acuity, particularly in myopia.
- This claim requires critical evaluation based on empirical evidence.
Purpose of the Study:
- To critically review and challenge data on the influence of suggestion on visual acuity.
- To explore the potential mechanisms, such as attention, mediating these effects.
Main Methods:
- Review of behavioral, neurocognitive, and ophthalmological findings.
- Analysis of existing literature on suggestion, hypnosis, and visual acuity.
Main Results:
- Evidence does not support significant improvement in myopic vision through suggestion or hypnosis.
- Apparent effects of suggestion on visual acuity are likely mediated by attentional shifts.
Conclusions:
- Hypnosis and suggestion have limited capacity to enhance visual acuity.
- A responsible scientific approach must delineate the limitations of these phenomena, particularly concerning attention's role.