This article is from the Vision and Eye Care FAQ, by grants@research.canon.com.au (Grant Sayer) with numerous contributions by others.
Short answer is no. The conjunctiva, the tissue that covers the white part
of the eye (the sclera) forms a cul-de-sac between from the edge of the cornea
to the eyelid margin. Sometimes a contact lens, especially a soft
contact lens may roll up and become difficult to find. An eyecare practitioner
will be able to locate the lens and remove it.
 
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