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Abstract
Obstructive Meibomian gland dysfunction (MGD) affects millions of patients around the world. Its effective treatment with intraductal meibomian gland probing (MGP), was first reported in 2010. Since then, MGP has provided relief to thousands of patients globally suffering with refractory MGD. The purpose of Meibomian gland probing is restoring the integrity of the gland’s central duct by entering the gland through the natural orifice, releasing fixed obstruction thought to be periductal fibrosis, thereby establishing and/or confirming the patency of the duct, and concurrently equilibrating intraductal pressure as well as promoting gland functionality with meibum production. There may or may not be immediate secretion of meibum upon successful restoration of ductal integrity depending on the gland’s state of function and degree of atrophy. One double-blind placebo-controlled study has been conducted and, with the accumulated evidence of over 12 other peer reviewed articles in the scientific literature, overwhelmingly indicates that MGP is a safe and effective treatment for the MGD patient refractory to prior standard care and as a first-line treatment. This paper describes relevant fundamental concepts, dispels commonly held misconceptions, and provides an objective review of the current understanding and effectiveness of MGP for the treatment of obstructive MGD. Our analysis will better equip clinicians to draw informed conclusions about both subjective and objective findings reported in MGP studies and researchers to design future robust studies that provide meaningful results.
Author Contributions
All authors made a significant contribution to the work reported, whether that is in the conception, study design, execution, acquisition of data, analysis and interpretation, or in all these areas; took part in drafting, revising or critically reviewing the article; gave final approval of the version to be published; have agreed on the journal to which the article has been submitted; and agree to be accountable for all aspects of the work.
Disclosure
SLM is a >5% owner of MGD Innovations, Inc. which holds patents on instrumentation and methods for intraductal diagnosis and treatment of meibomian gland disease (MGD). SLM also has patents on the use of jojoba-based treatment options for MGD. He also reports patent royalties from Katena (nos: 9510844, 10159599, and 11110003). NAW is chair of the Not A Dry Eye Foundation. The authors report no other conflicts of interest in this work.