There are a variety of different operations for glaucoma that differ in their efficacy, safety, side effect profile and suitability in different types of glaucoma.
In general they can be divided into:
These procedures are used when the eye pressure needs to be significantly lowered with the exact procedure depending on the type of glaucoma and whether previous surgery has been performed.
Minimally Invasive Glaucoma Surgery (MIGS)
These are a group of procedures that lower the eye pressure in a less invasive way than filtration surgery. They can often be combined with cataract surgery.
Cataract surgery involves removing the natural crystalline lens inside the eye and replacing with an artificial one. It is often associated with a drop in eye pressure and can be combined with a minimally invasive glaucoma surgery such as iStent Inject or laser such as Micropulse Cyclophotocoagulation.
It is also a good treatment for angle closure or angle closure glaucoma as removing the bulky natural lens and replacing with a thin artificial one frees up space in the front of the eye and opens the drainage channel.