Inclusion Criteria:  Females with age 20-35years using digital devices androids and laptops Ametropia of up to 1.0 Diopter sphere(DS) and astigmatism of less than 0.5 Emmetropes.  Exclusion Criteria:  Subjects using topical drugs Smokers Subjects undergoing dry eye treatment History of contact lens wear within the past three months Corneal surface disease other than dry eye Corneal or eyelid infections Corneal surgeries Refractive error of more than 1 DS of SE and astigmatism of greater than0.5DC Age <18 and >3 years Subjects already using blue light blocking filters I phone users Pregnant women Males