Chopra, S KGeorge, SDaniel, R1985-07-012009-05-291985-07-012009-05-291985-07-01Chopra SK, George S, Daniel R. Tear film break up time (B.U.T.) in non-contact lens wearers and contact lens wearers in normal Indian population. Indian Journal of Ophthalmology. 1985 Jul-Aug; 33(4): 213-6http://imsear.searo.who.int/handle/123456789/72597engAdolescentAdultChildContact LensesFemaleHumansKeratoconjunctivitis --diagnosisKeratoconjunctivitis Sicca --diagnosisMaleMiddle AgedSurface TensionTears --physiologyTear film break up time (B.U.T.) in non-contact lens wearers and contact lens wearers in normal Indian population.Journal Article