A polyhedral optical conduit having a longitudinal axis, a first transverse axis perpendicular to the longitudinal axis, and a second transverse axis perpendicular to both the longitudinal axis and the first transverse axis. The polyhedral optical conduit includes a plurality of parallel sides. Two of the parallel sides define openings (e.g., apertures) that further define a passageway there between. The passageway includes an optical device disposed within it, typically oriented in the plane defined by the transverse axes. Electromagnetic radiation, e.g., light, is projected into the passageway. When the light exits the passageway it may appear differently depending on the orientation of the polyhedral optical conduit and the optical device therein. This provides a visual representation of quantum phenomena.

A reusable surgical model of the eye has mating anterior and posterior segments. The posterior segment has structures corresponding to those of the eye, including a hollow globe and an image of the fundus positioned upon an interior, posterior portion of the globe. A mating connector is peripherally formed about an open end of the globe. The anterior segment includes structures corresponding to those of the eye, including a pars plana, an opening in a region corresponding to an iris, and a lens positionable within the opening. The anterior segment has a peripheral connector which mates with that of the posterior segment. The lens is removably connected to the anterior segment, and has a focal length corresponding to a natural eye. A coating is applied to the fundus to enable simulation of a membrane peeling procedure, and the globe is fillable with a vitreous substitute.

A method and an apparatus for demonstrating optical properties of a lens for spectacle glasses are disclosed. A demonstrational tool exposes a spectacle lens or a pair of spectacle glasses to polarized light to demonstrate how the removal of polarized, reflected light from a display reduces glare. Further, the demonstrational tool exposes a phototrope lens or a pair of spectacle glasses with phototrope lenses to UV- or HEV-light to demonstrate the reversible self-tinting of the phototrope lenses.

A method and an apparatus for demonstrating optical properties of a lens for spectacle glasses are disclosed. A demonstrational tool exposes a spectacle lens or a pair of spectacle glasses to polarized light to demonstrate how the removal of polarized, reflected light from a display reduces glare. Further, the demonstrational tool exposes a phototrope lens or a pair of spectacle glasses with phototrope lenses to UV- or HEV-light to demonstrate the reversible self-tinting of the phototrope lenses.

A model eye for use with an imaging system is provided. The model eye includes a shape that mimics a shape of a real eye of a subject and focal parameters of the real eye of the subject. The model eye is positioned in the imaging system in place of the real eye to assess and/or calibrate the imaging system. Related methods, systems and devices are also provided herein.

A model eye for use with an imaging system is provided. The model eye includes a shape that mimics a shape of a real eye of a subject and focal parameters of the real eye of the subject. The model eye is positioned in the imaging system in place of the real eye to assess and/or calibrate the imaging system. Related methods, systems and devices are also provided herein.

A demonstrator (1) of qualities of a spectacle lens material, includes a hollow base (10) which is open through an observation window (13), and a lens (20) which closes the observation window and includes at least one part (21) made of the spectacle lens material. The demonstrator includes at least two separate demonstration elements 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 the demonstrator lens (20).

A demonstrator (1) of qualities of a spectacle lens material, includes a hollow base (10) which is open through an observation window (13), and a lens (20) which closes the observation window and includes at least one part (21) made of the spectacle lens material. The demonstrator includes at least two separate demonstration elements 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 the demonstrator lens (20).

The invention is directed to an apparatus for demonstrating the visual impression for a wearer of spectacles having polarizing spectacle lenses. The apparatus includes a memory for providing a first image having a motif and a first polarization direction corresponding thereto and a second image having the same motif and a second polarization direction corresponding thereto, which is different from the first polarization direction. The apparatus also includes a display device for displaying the first image with light polarized in the first polarization direction and the second image with light polarized in the second polarization direction in a superposed representation, such that the motif of the first image and the motif of the second image coincide dimensionally identically. The invention is also directed to a method for demonstrating the visual impression for a wearer of spectacles having polarizing spectacle lenses.

The invention is directed to an apparatus for demonstrating the visual impression for a wearer of spectacles having polarizing spectacle lenses. The apparatus includes a memory for providing a first image having a motif and a first polarization direction corresponding thereto and a second image having the same motif and a second polarization direction corresponding thereto, which is different from the first polarization direction. The apparatus also includes a display device for displaying the first image with light polarized in the first polarization direction and the second image with light polarized in the second polarization direction in a superposed representation, such that the motif of the first image and the motif of the second image coincide dimensionally identically. The invention is also directed to a method for demonstrating the visual impression for a wearer of spectacles having polarizing spectacle lenses.