<prompt> Rose-Bengal test is -To detect the presence of conjunctival xerosisTo test the pasteurized milkTo detect the rabies antigen in corneal cellsIs positive in connective tissue disorder  <response>: Rose bengal test: It is a very useful test for detecting even mild cases of KCS keratoconjuctivitis sicca. Depending upon the severity three staining patterns A,B and C have been described. A- severe cases with confluent staining of conjunctiva and cornea. B- moderate cases with extensive staining. C- mildearly cases with fine punctate stains in the interpalpebral area. Reference: ophthalmology , A.K khurana 