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Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...

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Related Experiment Video

Updated: Jul 14, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
05:46

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

Published on: September 20, 2024

847

Hypnosis in photoablative refractive surgery: a monocentric prospective study.

Oscar Kallay1,2, Anna Zein-El-Din2, Therry Vilet1,3

  • 1Centre medical de l'Alliance, Braine l'Alleud, Belgium.

Journal of Cataract and Refractive Surgery
|February 25, 2026
PubMed
Summary

Hypnosis improved patient cooperation and comfort during refractive surgery, though it did not significantly reduce anxiety or affect physiological markers. This technique shows promise for enhancing the surgical experience in outpatient settings.

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Last Updated: Jul 14, 2026

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Area of Science:

  • Ophthalmology
  • Psychology
  • Surgical Innovation

Background:

  • Refractive surgery aims to correct vision but can induce patient anxiety and discomfort.
  • Standard care protocols may not fully address the psychological aspects of outpatient surgical procedures.
  • Exploring adjunct techniques to improve patient experience is crucial for optimizing surgical outcomes.

Purpose of the Study:

  • To assess the effectiveness of hypnosis in managing anxiety and enhancing surgical ease during refractive surgery.
  • To evaluate hypnosis's impact on patient cooperation and intraoperative comfort.
  • To determine if hypnosis influences physiological markers of stress during laser eye surgery.

Main Methods:

  • A monocentric randomized prospective study involving 34 patients undergoing PRK or LASIK.
  • Patients were assigned to either standard care or standard care plus real-time hypnosis during surgery.
  • Anxiety (APAIS), heart rate, surgeon-rated parameters, satisfaction, and communication quality were measured.

Main Results:

  • No significant differences in anxiety scores or hemodynamic parameters were observed between groups.
  • The hypnosis group demonstrated significantly improved cooperation (p = 0.004) and surgical comfort (p < 0.0001).
  • Higher intraoperative comfort, satisfaction, and communication quality were reported by the hypnosis group (p < 0.05).

Conclusions:

  • Conversational hypnosis significantly enhances patient experience and cooperation during refractive laser surgery.
  • Despite no impact on physiological markers, hypnosis offers a promising adjunctive relaxation technique for outpatient settings.
  • This study is the first to demonstrate the benefits of hypnosis for patient-centered outcomes in refractive surgery.