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  • Title: Sub-Tenon's versus retrobulbar anesthesia for cataract surgery.
    Author: Khoo BK, Lim TH, Yong V.
    Journal: Ophthalmic Surg Lasers; 1996 Sep; 27(9):773-7. PubMed ID: 8878196.
    Abstract:
    BACKGROUND AND OBJECTIVE: A prospective, randomized, double-blind study was conducted to compare sub-Tenon's anesthesia with retrobulbar anesthesia. PATIENTS AND METHODS: One hundred six patients undergoing cataract extraction received either sub-Tenon's anesthesia (55 patients) or retrobulbar anesthesia (51 patients). The number of injections required, time until adequate akinesia was achieved, degree of pain experienced, and complications of the anesthetic injection were compared. The depth of the akinesia after sub-Tenon's injection was graded. RESULTS: There was no significant difference between the two study groups with respect to time of onset of adequate akinesia, the need for a second top-up injection, and the effectiveness of the akinesia. The sub-Tenon's injection group reported less pain during the anesthetic injection, as well as during the postoperative injection of subconjunctival gentamicin. CONCLUSION: Sub-Tenon's anesthesia is a safe technique that is comparable to retrobulbar anesthesia.
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