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[Visual impact of sub-tenon's anesthesia during surgery for retinal detachment].
1Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong, Shantou 515041, China.
Summary
Sub-Tenon
Area of Science:
- Ophthalmology
- Retinal Surgery
- Anesthesia
Background:
- Sub-Tenon's anesthesia is commonly used for ophthalmic surgeries.
- Its visual impact during procedures like pars plana vitrectomy (PPV) needs investigation.
Purpose of the Study:
- To assess the visual effects of sub-Tenon's anesthesia during PPV.
- To identify factors influencing these visual disturbances.
Main Methods:
- Prospective case series of 104 patients undergoing PPV or combined phacoemulsification and PPV.
- Patients reported light perception at various surgical stages.
- Best corrected visual acuity (BCVA) and visual evoked potentials (VEPs) were measured pre- and post-operatively.
Main Results:
- Most patients (95.2%) experienced temporary no light perception (NLP) during surgery, especially with contralateral eye coverage.
- NLP incidence was influenced by eye coverage and photobleaching.
- Postoperative BCVA and VEPs significantly improved compared to preoperative values.
Conclusions:
- Temporary NLP is common during PPV with sub-Tenon's anesthesia, likely due to optic nerve conduction block.
- These visual effects are transient and do not harm long-term visual function.
- NLP incidence is not correlated with patient age, gender, or preoperative visual acuity.
