Figure 2
Schematic illustration of the possible evolution of macular hole in eyes with rhegmatogenous retinal detachment. From left to right: in attached retina, the a to a’ distance is shorter than b to b’. When retina detaches at macular area, the retina curvature changes from concave to convex shape, thus the distance from a to a’ becomes larger than b to b’. As the retinal detachment increases in height, the tangential force of inner retina increases which makes a break at fovea from inner retinal surface. In contrast, the less tangential force, outer retinal edema and corrugation make the outer retina relatively more redundant and leaves the ellipsoid zone at fovea.
