Abstract: A device is provided for demonstrating and testing the effectiveness of an anti-reflection treatment of an ophthalmic lens. An image (2) is backlit by a light source (7) with a second face (1B) forming an angle of at least 90° relative to the first face and is placed facing a third face (1C) for positioning at least one ophthalmic lens (4A) with its concave face facing outwards. The device includes text (5) on a transparent medium behind the mirror and a face of uniform color (6) behind the text, such that when a user looks through the orifice (4) and the lens (4A), the user can see the reflection of the image (2) on the lens (4A) by means of the mirror (3), the image being superposed on the text (5) and on the face (6) of uniform color.

Abstract: A device for demonstrating and comparatively testing the effectiveness of an antireflection treatment for an ophthalmic lens, the device comprising an image (2, 20) and a mirror (3, 30). According to the invention, the device further comprises a part (1, 10) having a first face (1A, 10A) for supporting said image (2, 20), a second face (1B, 10B) for supporting said mirror (3, 30) substantially perpendicularly to said first face, and a third face (1C, 10C) for positioning at least one ophthalmic lens, the third face being situated. facing said second face and being provided with a positioning arrangement for positioning said lens (4?, 4?, 40), the arrangement comprising at least one orifice (4A, 4B, 40A) arranged in said third face facing said mirror, in such a manner that when a user looks through said orifice, the user can see the resulting reflection of said image on said lens by means of said mirror (3, 30).

Abstract: A device has an image and a mirror for demonstrating and testing in comparative manner the effectiveness of an anti-reflection treatment of an ophthalmic lens. The device has a part (1) having a first face (1A) supporting the image (2) and a second face (1B) supporting the mirror (3). The image (2) is backlit by a light source (7), the second face (1B) forms an angle of at least 90° relative to the first face and is placed facing a third face (1C) for positioning at least one ophthalmic lens (4A) with its concave face facing outwards. The third face is provided with an arrangement for positioning the lens and including at least one orifice (4) arranged in the third face.

Abstract: A device for demonstrating and comparatively testing the effectiveness of an antireflection treatment for an ophthalmic lens, the device comprising an image (2, 20) and a mirror (3, 30). According to the invention, the device further comprises a part (1, 10) having a first face (1A, 10A) for supporting said image (2, 20), a second face (1B, 10B) for supporting said mirror (3, 30) substantially perpendicularly to said first face, and a third face (1C, 10C) for positioning at least one ophthalmic lens, the third face being situated. facing said second face and being provided with a positioning arrangement for positioning said lens (4?, 4, 10), the arrangement comprising at least one orifice (4A, 4B, 40A) arranged in said third face facing said mirror, in such a manner that when a user looks through said orifice, the user can see the resulting reflection of said image on said lens by means of said mirror (3, 30).

Abstract: An ophthalmic lens with an aspherical face is provided having a near vision region which is larger in size and wider than that of conventional multifocal lenses, and having reduced aberrations and, notably, astigmatism. Using .DELTA. to signify a difference in mean sphere between the near vision control point and the geometrical center of the lens, this is achieved by making a surface area defined by points less than 20 mm from the geometrical center of the lens, and for which cylinder is comprised between 0.42.DELTA. and 0.84.DELTA. greater than the surface area defined by points less than 20 mm from the geometrical center, and for which cylinder is less than 0.42.DELTA..