Name	Info	Provider	Link
Glaucoma	free resource	MedlinePlus Health Information	https://medlineplus.gov/glaucoma.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9565040.ui
Cited by Patents in	free resource	The Lens - Patent Citations Database	https://www.lens.org/lens/search/patent/list?q=reference_cited.nlp.ids.pmid:9565040
	subscription/membership/fee required	Silverchair Information Systems	https://jamanetwork.com/journals/jamaophthalmology/fullarticle/vol/116/pg/443