Glaucoma valve or the valved implants, such as the Ahmed glaucoma valve implant and the later generation pressure ridge Molteno implants. These are indicated for glaucoma patients not responding to maximal medical therapy, with previous failed guarded filtering surgery (trabeculectomy). The flow tube is inserted into the anterior chamber of the eye and the plate is implanted underneath the conjunctiva to allow flow of aqueous fluid out of the eye into a chamber called a bleb. The ExPress Mini Shunt is a newer, non-valved device that was originally designed to provide a direct conduit from the anterior chamber to the sub-conjunctival space
Minimally invasive glaucoma surgery to augment outflow to the suprachoroidal space in order to control intraocular pressure; it is indicated for the treatment of primary open-angle glaucoma. The stent is implanted through an ab interno approach and inserted into the supraciliary space (between the ciliary body and sclera), effectively creating a controlled cyclodialysis cleft, which is kept open by the device. The first clinical data on the device was presented in 2010 showed sustained IOP lowering and MIGS-like safety profile. This has been substantiated in subsequent studies in the combined setting with cataract surgery and as a stand-alone treatment for patients failing glaucoma topical