This is a study comparing short- (1 year), mid- (3 years), and long-term (5 years) cumulative incidences of failures in participants who undergo a second aqueous shunt (SAS) to those cumulative incidences of failures in participants who undergo a second aqueous shunt (SAS) to those cumulative incidences of failures in participants who undergo transscleral diode laser cyclophotocoagulation (TLC) for eyes with uncontrolled glaucoma with a single existing aqueous tube shunt procedure.