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  • Title: [Lacrimal film evaluation of patients with facial dystonia during botulinum toxin type A treatment].
    Author: Costa PG, Cardoso IP, Saraiva FP, Raiza AC, Tanaka LK, Matayoshi S.
    Journal: Arq Bras Oftalmol; 2006; 69(3):319-22. PubMed ID: 16936952.
    Abstract:
    PURPOSE: To determine the effect of botulinum toxin injection in the eyelid on lacrimal film in patients with facial dystonia. METHODS: Twenty-four patients with essential blepharospasm and hemifacial spasm were submitted to botulinum toxin injection and lacrimal film tests were performed before the application and after seven and thirty days. RESULTS: There was improvement in symptoms of dry eye and rose bengal test, however, the breakup time and Schirmer's test did not show significant variation between pretreatment and after 1 month of follow-up. CONCLUSION: The dry eye symptoms in patients with facial dystonia may be attenuated by botulinum toxin due to its possible inhibitory effect on the orbicular muscle leading to a decrease in lacrimal pump.
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