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The earliest impact of nanomedicine in ophthalmology is likely to involve the areas of biopharmaceuticals , implantable materials ( e . g . tissue regeneration scaffolds , bioresorbable materials ) , implantable devices ( e . g . glaucoma drainage valves ) , and diagnostic tools ( e . g . intraocular pressure ( IOP ) monitors ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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