Effect of partial trasectomy on the stability of the precorneal tear film

ABSTRACT

The Precorneal tear film is formed of three components. We chose to study the most superficial oily layer which is secreted by the meibomian glands. Ten cases of trichiasis entropion were selected from the out-patient ophthalmic clinic of Ain Shams University Hospital during the year 1984. We did for every case before and after Snellen's operation [partial tarsectomy] Schirmer's tear that test No. 1 and tear film break up time [B.UT.]. The results were diminution of Schirmer's test No. 1 and Shortening of tear film break up time after Senllen's operation by two weeks. This indicates that the oily layer is important for stabilization of the precorneal tear film