A decreased volume of tears may not be the cause of dry eye symptoms for all patients.  Many patients with dry eyes have underlying factors which cause dryness. One of the most common of these factors is meibomian gland dysfunction (MGD), also known as posterior blepharitis .  Employing treatments that target the root cause of dry eye symptoms is the most effective way to treat dry eye. What are the meibomian glands? The meibomian glands are located in the eyelid margins, near the lashes.  …
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