<prompt> Schwalbes line represents -Junction of the choroid and retinaTermination of corneal descemets membraneDivision between bulbar and palpebral conjunctivaUpper limit of the macula  <response>: Ans. is b i.e., Termination of corneal descemets membrane Schwalbes line is the anatomical line found on the interior surface of the eyes cornea, and delineates the outer limit of the corneal endothelium layer. Specifically, it represents the termination of Descemets membrane.In many cases it can be seen via gonioscopy. The cornea has five distinct layers from superficial to deep: -1 Epithelium : - It is the outermost part of cornea and is composed of stratified squamous non-keratinized epithelial cells.2 Bowmans membrane : - It is not a true membrane but simply a condensed superficial part of stroma. Once destroyed, it does not regenerate.3 Stroma Substantia propria : - This layer constitutes most of the cornea 90 of thickness. It consists of collagen fibrils lamellae embedded in hydrated matrix of proteoglycans.4 Descemets membrane : - This layer bounds the stroma posteriorly. In the periphery it appears to end at the anterior limit of trabecular meshwork as Schwables ring.5 Endothelium : - It is a single layer of flat polygnonal cells. The endothelial cells contain active-pump mechanism and is the most important layer in maintaining the transparency of cornea. The cell density of endothelium is around 3000 cellsmm2 in young adults, which decreases with the advancing age. There is a considerable functional reserve for the endothelium. Therefore owing to the high functional reserve and good metabolic activity of the endothelial layer, regeneration occurs rapidly after injury. Therefore, corneal decompensation occurs only after more than 75 percent of the cells are lost. 