Visual testing articles made of cardboard, namely, eye charts, eye cards, eye visual contrast charts, symbol books, namely books with pictures therein bearing visually observable items, 3-dimensional symbols, visual testing devices, namely, cone adaptation, test items featuring colored 3-dimensional chips, fixation sticks and paddler, orientation mailboxes featuring 3-dimensions with a slot for insertion of a letter, campimeter featuring 3-dimensional articles for testing peripheral vision