ABSTRACT
The main factor in the health of ocular surface is the secretion of lipids by the meibomian glands into tears, where they form a polar lipid layer that prevents aqueous evaporation. Nowadays, the increase in usage of digital screens in human life is one of the leading causes of dysfunctioning of meibomian glands. This results in dry eye disease (DED). Since the prevalence of Meibomian gland dysfunction (MGD) is increasing rapidly, it becomes imperative to find effective techniques to diagnose MGD with minimal human intervention. Early detection of MGD will be helpful to provide medication in right time to the patient. In this paper, different techniques applied to diagnose MGD have been surveyed thoroughly. This study will provide the current status of research that has been carried out till date to diagnose MGD. We conclude with a literature review, acknowledging the important contributions made to our present understanding of the MGs and MGD by a number of researches.
