Name	Info	Provider	Link
Cataract	free resource	MedlinePlus Health Information	https://medlineplus.gov/cataract.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34011708.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34011708/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34011708
	free resource	scite Smart Citations	https://scite.ai/reports/34011708
	free resource	Wolters Kluwer	https://doi.org/10.4103/ijo.IJO_1903_20