Fig. 1

The method of calculating the proportion of chalazion area in the image of the infrared meibomian gland is shown (a shows the end of the gland at the upper margin of the iliac crest, b shows be the most visible tarsal conjunctiva of the everted lid, c shows the gland at the iliac crest, d shows the nasal border was defined as the tear punctum, e shows the chalazion area). a shows the whole area of the tarsal plate, and b shows the chalazion area