About the dry eye syndrome due to Meibomian Gland Dysfunction (MGD)
“The Meibomian gland dysfunction has been identified as the principal cause of dry eye syndrome throughout the world”.
These are the results of the first report about Meibomian Gland Dysfonction (MGD) from the ARVO (the Association for Research in Vision and Ophthalmology) conference organized in 2010. More than 50 members and some of the biggest experts in research and Ophthalmology from around the world gathered for this event.
Dry eye syndrome is generally due to a Meibomian gland dysfunction, also called Blepharitis. This results in the important oil layer of our tears being unstable and thinner than it should normally be, causing an insufficient production of tears, or excessive evaporation. It is now acknowledged that the majority of evaporative cases are primarily due to the lack or insufficiency of the external lipid layer of the lacrimal film, produced by the Meibomian glands.
There are approximately 80 Meibomian glands located in the upper and lower eyelids of each eye. These glands produce an oil called the lipid layer, avoiding tear evaporation and adapting tears to the irregularities of the eye surface. Lipids are made of polarized fatty acids. Their fluidity is ensured by the body temperature. They are non-polarised on the surface, giving stability to the lacrymal fluid and allowing the lubrication of the palpebral conjunctival plan. The contraction of the Riolan muscle allows the lacrymal film to spread out.