Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  mushroom(noun) common name for an edible agaric (contrasting with the inedible toadstool) 2  mushroom(noun) mushrooms and related fleshy fungi (including toadstools, puffballs, morels, coral fungi, etc.)
A cornea transplant is an operation used to remove all or part of a damaged cornea and replace it with healthy cornea tissue from the eye of a suitable donor. A cornea transplant is an operation used to remove all or part of a damaged cornea and replace it with healthy cornea tissue from the eye of a suitable donor.
An artificial anterior chamber is used to support the donor cornea whilst it is being cut with a microkeratome (miniature motorised cutting device). The microkeratome skims off the outer layers of the cornea leaving a very thin layer of stromal fibres supporting the inner Descemet's membrane and the endothelial cells.he surface of the cornea is an extremely important component of the optical system of the eye, so any irregularity in the corneal shape has a major effect on visual performance. Because DSAEK only exchanges the inner cell layers of the cornea it has little or no effect on its external shape.