In many cases there is a thick lens in a smaller than average eye, therefore removing the natural lens and replacing it with a clear one helps to ‘open’ the angle. Some clinicians say that the most common glaucoma operation is in fact cataract extraction. A replacement lens implant is placed in the eye, which improves the vision and also lowers the risk of glaucoma progression.
A recent international multicentre study showed that cataract surgery with lens replacement is effective for angle closure glaucoma even when there is hardly any cataract present in people with high eye pressures due to angle closure glaucoma.
In some cases where laser or cataract surgery is not effective in lowering the eye pressure, more specialised glaucoma filtration surgery such as trabeculectomy or even tube surgery might be required.