<prompt> Dellen is-Localized thinning of peripheral corneab Raised lesions in corneo limbal junctionAge related macular degenerationMarginal keratitis  <response>: Impaired eyelid function. It is seen in patientswith Bells palsy, exposure keratitis, dellen,symblepharon, pterygium, nocturnal lagophthalmosand ectropion. REF:Comprehensive ophthalmology,20th edition,AK Khurana,pg no.365. 