Usually pigment: Pigmented cells before birth can migrate onto the conjunctiva and proliferate with time causing brownish spots. Although natural, they can both some in their appearance. There are means to remove them if they are a problem but this is cosmetic as these are not going to bother the vision or health of the eye.
Answered 4/3/2013
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Pinguecula: A pinguecula, which is a deposit/build up on the white part of the eye (sclera) due to uv light and dryness of the eyes. You can use artificial tears, and use a cap and/or sunglasses when outdoors. If it gets large, constantly irritated (red), or grows over the cornea, you may need medicated drops or surgery.
Answered 12/10/2013
5.2k views
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