http://www.maculardegeneration.org/lvarticle3.htm

http://www.magnifyingglasses.co.uk/acatalog/
Catalogue en ligne / On line Catalog

http//www.eschenbach.com

http://www.veegee.com
Microscopes

http://www.ameriphone.com
Produits de la gamme / Ameriphone products

http://www.eyeassociates.com

http://www.compukiss.com/vc/vc.html