Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0161-6420(13)00048-1
Refractive Errors	free resource	MedlinePlus Health Information	https://medlineplus.gov/refractiveerrors.html
	free resource	scite Smart Citations	https://scite.ai/reports/23642748