If another doctor has already recommended iStent, Hydrus, Durysta, iDose, goniotomy, or canaloplasty, the MIGS guide explains that option. If the diagnosis, the pressure goal, or the need for treatment is still unclear, start with an evaluation instead. Glaucoma can damage peripheral vision before you notice symptoms, so pressure readings only mean something next to optic nerve structure, visual field function, corneal thickness, drainage angle, and your target pressure.
Elevated pressure is not automatically a reason for surgery. Ocular hypertension means eye pressure is high without confirmed optic nerve damage or visual-field loss, and it is often handled with monitoring, drops, or SLT. MIGS enters the conversation when open-angle glaucoma, cataract timing, drop burden, or a specific pressure goal makes a procedure medically appropriate. The glaucoma overview covers the condition itself if you need that first.