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A 45-year-old female asked:

Is the extra skin near tear duct surrounding eyeball called thr plica semilumaris and if so what causes burning when no infection is present?

2 doctor answers3 doctors weighed in
Dr. Geoffrey Rutledge
Internal Medicine 42 years experience
Multiple causes: There are many causes of burning sensation in the eyes in the absence of infection. Most common causes are allergy, irritation from dust or foreign body, and dry eyes (not enough tears).
Dr. Jon Fishburn
Ophthalmology 31 years experience
Dry eyes likely: The plica semilunaris is a vestigial structure of the nictitating membrane seen in other animals. It aides in forming a tear lake. The burning sensation you are experiencing is likely dry eye related and artificial tears should aid in your comfort.
Last updated Nov 4, 2017

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