DCR is an effective and safe method for the treatment of nasolacrimal obstruction. Meta-analysis of outcomes was not feasible because of the heterogenous patient groups and outcome measures used. Nonetheless, the literature provides considerable levels 3 and 4 evidence to support DCR surgery in adults. Outcomes after EN-DCR and EX-DCR were comparable. The failure rate for LA-DCR was higher.
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Leong et al. (2010) studied this question.
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