It could be a chalazion ...
http://en.wikipedia.org/wiki/Chalazion
http://en.wikipedia.org/wiki/Stye
More examples ...
http://webeye.ophth.uiowa.edu/eyeforum/atlassearch1.htm?appSession=362148454386510
http://en.wikipedia.org/wiki/Chalazion
http://en.wikipedia.org/wiki/Stye
More examples ...
http://webeye.ophth.uiowa.edu/eyeforum/atlassearch1.htm?appSession=362148454386510
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