Prospective 7-year randomised investigator -masked clinical trial 79 eyes (79 patients) enrolled randomised to surgery by PEX and previous pilocarpine use Deep sclerectomy n = 41 Trabeculectomy n = 38 Estimated DS : TE success = 1:3 10% attrition ; power = 90%, alpha = 5%
Methods and evaluation of outcomes:
1. IOP: average of the two highest readings of the IOP phasing (6 readings)
2. VA: LogMAR (ETDRS chart)
3. Lens: LOCSII (slit lamp classification), worsening = one step progression confirmed at two visits
study visits: every 4 months
