Meibomian gland dysfunction

Meibomian gland dysfunction
Other names	meibomitis
Meibomian glands in the lower eyelid imaged under amber light to show vasculature support and the gland structure
Specialty	Ophthalmology, optometry
Types	Low delivery (hyposecretory or obstructive) and High delivery.
Risk factors	Aging, rosacea, Sjögren syndrome, isotretinoin use

Meibomian gland dysfunction (MGD, also meibomitis or meibomianitis) is a chronic disease of the meibomian glands, which is commonly characterized by obstruction of the end of the duct that delivers the secretion produced by the glands (called meibum) to the eye surface, which prevents the glandular secretion from reaching the ocular surface. The dysfunction could be that the amount of secretion produced may be abnormal (either too little or too much meibum produced). Dysfunction could also be related to the quality of the meibum produced. MGD may result in evaporative dry eye, blepharitis, chalazion, unsealed lid during sleep, and meibomian gland atrophy.