Assertion: cornea's layer | /r/HasProperty | involved
Facets:
Source sentences:
text: Descemet’s stripping endothelial keratoplasty), When deeper layers of the cornea are involved, e.g. for keratoconus, then we perform other types of corneal transplantation such as DALK (deep anterior lamellar keratoplasty) and PK (penetrating keratoplasty).