अमूर्त

Assess the quality and quantity of the lipid layer by interferometry before and after SMILE surgery with the help of OSA and the OSDI questionnaire.

Susmita Banerjee*

The superficial lipid layer is relatively thin, oily layer, around 100 nm in thickness, and is derived from three sources, all of which are in the eyelids. The meibomian gland situated in the upper and lower tarsal plates mainly secretes the lipid layer along with the contributions made by the glands of moll and Zeiss. The lipid layer is important in retarding evaporation of the underlying aqueous layer. The lipid layer comprises polar and non-polar lipids. The primary constituents are mixed wax esters and sterol esters. The makeup around 9% of the total lipid. The remainder consists of free sterols, free fatty acids, hydrocarbons and phospholipids