DEMONSTRATOR OF QUALITIES OF A SPECTACLE LENS MATERIAL

摘要

The invention relates to a demonstrator (1) of qualities of a spectacle lens material, comprising a hollow base (10) which is open through an observation window (13), and a lens (20) which closes said observation window and comprises at least one part (21) made of said spectacle lens material. According to the invention, said demonstrator comprises at least two separate demonstration means selected from the following list: an electrostatic element (50) that can move under the action of an electrostatic attraction; an ultraviolet mark (43) which allows the ultraviolet light to be viewed with the naked eye; and an abrasive element (30) suitable for scratching said demonstrator lens (20).