###Rationale: Descement membrane: toughest layer of cornea Descement's Membrane : *Act as a basement membrane for the endothelial cells *Type 4 & type 8 are most common type of collagen in DM *Toughest layer that provides protection from perforation *Responsible for descemetocele formation. *Site of deposition of copper as KF ring in wilson's disease (. If dua layer is in option then go for that) Endothelium is responsible for behaving like a pump that maintains the relatively dehydrated state of the cornea thereby maintaining its transparency The other options are all true

###Answer: OPTION B IS CORRECT.
###Question: All of the following are true about layers of cornea except :
###Options:
A. Predescemet's layer is also known sd Dua's layer
B. Type 2 & type 4 type of collagen are present in Descement membrane
C. Corneal Stroma is the thickest layer of the cornea
D. Endothelium is responsible for maintaining relatively dehydrated state of cornea
