It is nothing but a symptom complex occuring as a sequale to deficiency or abnormality of tear film.Etiology: 1.Aqueous layer deficiency 2.Mucin deficiency 3.Lipid abnormality 4.Impaired eye lid function 5.EpitheliopathiesSymptoms: irritation,foriegn body sensation,dryness,etcSigns: Stingy mucous,lusterless ocular surface,corneal inflammation,etcTests: Tearfilm Braekup test, Schirmer I test,Rose bengal staining,etcTreatment:Tear substitutes...
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