Topically applied lidocaine 4% effectively penetrates the eye, providing analgesia for phacoemulsification. We suggest at least 6 instillations in the hour preceding surgery. In this study, pain during surgery was primarily related to poor intraocular levels of the anesthetic agent.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/10330638