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. 2007 Oct 17;2007(4):CD003167. doi: 10.1002/14651858.CD003167.pub3

Vogel 1992.

Methods RCT. 
 Observer masked. 
 Active controlled.
Participants 189 people with POAG. 
 Racial constitution is not reported. 
 Inclusion criteria: IOP 22 mmHg or greater, visual field defect in SAP. 
 Exclusion criteria: history of severe ocular trauma or intraocular surgery, ocular infection within 3 months before study start, concomitant medication known to affect IOP.
Interventions Timolol 0.25% or 0.5% twice daily (adjustment according to IOP). 
 Pilocarpine 2% or 4% twice daily (adjustment according to IOP).
Outcomes Change of visual field mean sensitivity. 
 IOP.
Notes Study duration 2 years. Observer masked status is questionable because of miosis. 
 At baseline, 51 patients were excluded. 
 Drop‐outs during follow up: 18 timolol (4 adverse event or death) and 36 pilocarpine (7 adverse event or death). The authors do not state whether the adverse events or deaths were drug‐related.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Unclear risk B ‐ Unclear