Case 234. Acanthamebic keratitis (44 y-o F)

　 　 　 　
　
Smear preparation of painful ring-shaped keratitis in a contact lens wearer
 　
　 　 　 　

　

 　 Another view of the cyst of Acanthamoeba castellani with the thick, wrinkled cyst wall (Papanicolaou).