This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:

The main objective is to assess the results at two years of ab interno trabecular bypass surgery with Hydrus for OAG in comparison to conventional medical, laser, or surgical treatment in terms of efficacy and safety. A secondary objective will be to examine the effects of Hydrus surgery in people who have concomitant phacoemulsification in comparison to those who do not have concomitant phacoemulsification.