Participants: 35-80yo, OAG, uncontrolled on maximal medical therapy, phakic
Intervention:
Aim and regime:
a) Target IOP < 18 mmHg
b) Supplemental medical treatment allowed
c) 2nd and 3rd surgical intervention after failure of 1st
Groups:
Group 1: ALT-Trab-Trab
Group 2: Trab-ALT-Trab
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