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Is addition of a third or fourth antiglaucoma medication effective?
Neelakantan Arvind, Vaishnav Hetal D, Iyer Sandhya A, Sherwood Mark B
J GlaucomaApr 200441 citationsObservational Study
This study found adding a third or fourth glaucoma medication provides initial IOP reduction, but sustained, significant (≥20%) benefit with good safety is poor long-term, suggesting limited efficacy.