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Related Experiment Videos

Subjective visual experience during phacoemulsification cataract surgery under sub-Tenon's block.

N Prasad1, C M Kumar, B B Patil

  • 1Department of Ophthalmology, North Riding Infirmary, Newport Road, Middlesbrough TS4 3BW, UK.

Eye (London, England)
|May 2, 2003
PubMed
Summary

Most patients undergoing cataract surgery with sub-Tenon's block anesthesia reported seeing light and colors during the procedure. While generally acceptable, some found the visual experience frightening, necessitating preoperative warnings.

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Area of Science:

  • Ophthalmology
  • Anesthesia

Background:

  • Phacoemulsification cataract surgery is a common procedure.
  • Sub-Tenon's block is a frequently used local anesthesia technique for eye surgery.

Purpose of the Study:

  • To investigate the visual experiences of patients during phacoemulsification cataract surgery performed under sub-Tenon's block anesthesia.
  • To assess patient acceptance and emotional responses to intraoperative visual sensations.

Main Methods:

  • A prospective survey was conducted with 121 patients post-surgery.
  • Patients were interviewed on the same day regarding their visual perceptions during the procedure.

Main Results:

  • 81% of patients reported seeing light, 56% saw colors, and 40% perceived movements.

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  • 93% found the visual experience acceptable; however, 4% considered it unpleasant and 3% frightening.

    • Conclusions:

    • Patients undergoing phacoemulsification with sub-Tenon's block anesthesia commonly experience visual sensations.
    • A small but significant percentage of patients may have frightening visual experiences, highlighting the need for preoperative counseling.