Descemet Membrane Peeling

Corneal clarity can improve when dysfunctional endothelial cells are removed because the exposed posterior surface may be repopulated by healthy host or donor cells. These cells help regulate corneal hydration, reducing the fluid imbalance associated with swelling. The therapeutic effect therefore depends not only on peeling, but also on functional endothelial repopulation afterward.

Careful separation from the posterior corneal stroma allows the membrane to be removed while limiting disruption to surrounding corneal tissue. This targeted handling supports the technique’s surgical rationale by creating an endothelial surface that can receive donor cells or support host-cell repopulation without broadly disturbing the cornea.

In Descemet membrane endothelial keratoplasty, peeling prepares the eye to receive donor endothelial tissue after the dysfunctional membrane is removed. In Descemet stripping only, no donor tissue is described in the technique’s name; the exposed surface instead relies on healthy host endothelial cells to repopulate it. The distinction is therefore the source of replacement cells.

The procedure begins by identifying and separating the Descemet membrane from the posterior corneal stroma. Surgeons then peel the membrane with specialized microsurgical instruments, removing it with or without dysfunctional endothelial cells. Depending on the treatment plan, the exposed surface is subsequently prepared for donor endothelial transplantation or for repopulation by healthy host cells.

Descemet stripping only is used for selected endothelial disorders rather than as a universal approach. The provided context specifically identifies Fuchs endothelial corneal dystrophy as an example. Its rationale is to remove the dysfunctional membrane and allow healthy host endothelial cells to repopulate the exposed surface, avoiding the donor-cell component described for transplantation.

Relevant outcomes include improved visual clarity, reduced corneal swelling, and restoration of corneal transparency. These changes reflect whether endothelial cells have resumed effective regulation of corneal hydration after membrane removal. Because the approach targets the posterior corneal surface with limited tissue disruption, clinicians can assess both the functional result and the extent of tissue preservation.