Originally posted by ebel
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With the slit lamp the doctor can see the orifice and when they invert the lid they can see its gland. With the probe placed on the orifice, it is then advanced through any blockage of the orifice including epithelium, vascularization, fibrosis and keratinization.
The probing is targeted to the orifice opening and therefore not traumatic to a wide area of lid margin.
Also, even glands that do not produce meibum, when probed, can have their functionality restored. With the functionality restored the glands can again produce and secrete meibum.
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