Subjects already included in the OSLT trial (NCT03798223) will be invited to the extended trial (OSLT-R) at the time of SLT re-treatment or when OSLT follow up is scheduled to terminate. Patients are re-treated as needed, according to the randomized group assignment performed in the OSLT inclusion process.
The OSLT-R trial is aiming to elucidate:
* If the SLT efficacy, in terms of relative IOP reduction (percent of baseline IOP), changes with additional SLT iterations.
* If the longevity of IOP reduction after SLT changes with additional SLT iterations.
* If repeated SLT is associated with a change in postoperative discomfort or adverse events.
All of the above will be analyzed within each of the four treatment groups (SLT protocols) in the trial. Further, analysis will also be conducted regarding differences between the treatment groups regarding the above.
Further, analysis will be performed regarding SLT efficacy depending of the total number of SLT:s an eye has received, including those performed before entering the OSLT and OSLT-R trials.
