<prompt> Schwables ring is seen in which layer of corneaBowmanns membraneStromaDescemets membraneSubstantia propria  <response>: Ans. is c i.e., Descemets membrane Histology of cornea The cornea has five distinct layers from superficial to deep : ? Epithelium : - It is the outermost pa of cornea and is composed of stratified squamous non-keratinized epithelial cells. Bowmans membrane : - It is not a true membrane but simply a condensed superficial pa of stroma. destroyed, it does not regenerate. Stroma Substantia propria : - This layer constitutes most of the cornea 90 of thickness. It consists of collagen fibrils lamellae embedded in hydrated matrix ofproteoglycans. Descemets membrane : - This layer bounds the stroma posteriorly. In the periphery it appears to end at the anterior limit of trabecular meshwork as Schwahles ring. Endothelium : - It is a single layer of flat polygnonal cells. The endothelial cells contain active-pump mechanism and is the most impoant layer in maintaining the transparency of cornea. 