In the macula (central retina) a fibrocellular membrane is formed. It can be thought of as a cellophane layer on the surface of the yellow spot. This membrane causes a thickening and warping of the retinal layers, which then lead to the typical symptoms such as distorted vision and vision loss. The surgery is also the treatment of choice here. The membrane is removed. Often the membrane is stained with a dye before removal. After surgery, it usually takes four to six months for the best possible vision to be achieved.