Abstract
Objective: To evaluate a small dosage of Tenon's capsule anaesthesia as a less invasive substitute for retrobulbar anaesthesia in cataract surgery and intraocular lens (IOL) implantation. Study Design: Replacing the retrobulbar anaesthetic technique with the Tenon's capsule anaesthetic technique from April 1990. Setting: The Jikei University School of Medicine Department of Ophthalmology. Patients: Over 1500 patients requiring cataract surgery were given the Tenon's capsule method of anaesthesia. Main Outcome Measures: To show that complications attributable to retrobulbar anaesthesia would be less frequent with the Tenon's capsule method. Results: There is no suppression of ocular motility and no pain caused by the anaesthesia. Neither is there an elevation of blood pressure or arrhythmia. There are no complications either in the method of anaesthesia, or in the surgery. There is a definite sedative effect obtained with a small dosage (0.5–1.0 cc), and this effect is prolonged for 60 minutes or longer. Conclusion: Tenon's capsule anaesthesia is a very useful substitute for conventional retrobulbar anaesthesia, and is easy for inexperienced surgeons to use.
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