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Visual experiences during vitreous surgery under regional anesthesia: a multicenter study.

Colin S H Tan¹, Usman Mahmood, Paul D O'Brien

¹The Eye Institute at Tan Tock Seng Hospital, National Healthcare Group, Singapore.

American Journal of Ophthalmology

|December 27, 2005

Summary

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During vitreous surgery under regional anesthesia, many patients retain light perception. A significant minority experienced frightening visual events, with younger age, longer surgery, and seeing color being key risk factors.

Area of Science:

Ophthalmology
Surgical Anesthesia

Background:

Vitreous surgery is often performed under regional anesthesia.
Patient's intraoperative visual experiences and emotional responses are not well-documented.

Purpose of the Study:

To investigate subjective intraoperative visual experiences during vitreous surgery.
To determine if patients were frightened by these visual experiences.
To identify risk factors for frightening intraoperative visual experiences.

Main Methods:

A multicenter, prospective study involving 65 patients undergoing vitreous surgery under regional anesthesia.
Standardized questionnaire interviews conducted within 2 hours post-operation.

Main Results:

Related Experiment Videos

46.2% perceived light throughout, 29.2% had transient light loss, 24.6% had no light perception.

13.8% of patients reported frightening intraoperative visual experiences.

Frightened patients were more likely to see color (100% vs 55.4%), were younger (mean age 51.8 vs 64.6 years), and had longer surgeries (mean 118.9 vs 91.2 minutes).

Conclusions:

Most patients retain some light perception during vitreous surgery under regional anesthesia.
A notable percentage of patients experience frightening visual events.
Younger age, longer surgical duration, and intraoperative color perception are associated with frightening experiences.