Abstract: Method of calibrating a computerised colour vision test and method of testing colour vision on a computer The invention relates to a method of calibrating a colour vision test for testing colour vision under given ambient lighting conditions, which colour vision test is to be displayed on a colour display (12) of a computer (10) having at least one input interface (14), characterised by displaying a calibration test on the display (12) under given ambient lighting conditions to a person with normal colour vision before starting the colour vision test, displaying within at least one measuring region (31) of the display (12) a colour determination task requiring user input as a part of the calibration test, reading the user input through at least one input interface (14) of the computer (10), evaluating the read user input and determining as a result of the evaluation a display error resulting from a combination of a colour reproduction capability of the display (12) and an effect of the ambient lighting condit

Abstract: The invention relates to an artificial ophthalmic lens (20) containing an anterior optical surface (21) and a posterior optical surface (22), at least one of which contains a multifocal optical diffractive profile (25). A cross apodized profile part (25?) is formed on the diffractive profile (25) wherein phase shifting elements (27) are provided alternately forming the elements of a decreasingly apodized series (40) and an increasingly apodized series (41) in such a way that the decreasing and increasing elements of the two series (40, 41) form envelope curves that meet at a common intersection point (45). The invention further relates to a method for the production of such an artificial ophthalmic lens (20).

Abstract: Present invention relates to a colour filter (10) for modifying human colour vision, having a spectral transmission function in the visible light range wherein the average transmission in a wavelength range of at least 20 nm width below 530 nm is at least twice the average transmission in a second wavelength range between 530 and 580 nm, and the average transmission in a wavelength range of at least 20 nm width above 580 nm is at least twice the average transmission in the second wavelength range.

Abstract: Method of calibrating a computerised colour vision test and method of testing colour vision on a computer The invention relates to a method of calibrating a colour vision test for testing colour vision under given ambient lighting conditions, which colour vision test is to be displayed on a colour display (12) of a computer (10) having at least one input interface (14), characterised by displaying a calibration test on the display (12) under given ambient lighting conditions to a person with normal colour vision before starting the colour vision test, displaying within at least one measuring region (31) of the display (12) a colour determination task requiring user input as a part of the calibration test, reading the user input through at least one input interface (14) of the computer (10), evaluating the read user input and determining as a result of the evaluation a display error resulting from a combination of a colour reproduction capability of the display (12) and an effect of the ambient lighting condit

Abstract: The object of the invention relates to a method of designing a colour filter for modifying human colour vision by defining the spectral transmission function of the colour filter such as to maximise colour discrimination between more than one element, colour sample, of a colour sample set when a targeted human eye, the colour vision of which is to be modified, is viewing the colour sample set with the colour filter, and at the same time such as to minimise the difference between the colour identification of the colour samples by the targeted eye and a reference eye having a reference colour vision. The object of the invention also relates to such a colour filter, such a colour filter set, and the use of such colour filter and a method for modifying human colour vision.

Abstract: The object of the invention relates to an artificial ophthalmic lens (20) that contains an anterior optical surface (21) and a posterior optical surface (22), where the anterior optical surface (21) and the posterior optical surface (22) have a common optical axis (23), and at least one of the anterior optical surface (21) and the posterior optical surface (22) is a multifocal optics (24) that at least partly has a multifocal optical diffractive profile (25). A cross apodized profile part (25?) is formed on the diffractive profile (25), in other words phase shifting elements (27) are provided on the diffractive profile (25) that alternately form the elements of a decreasingly apodized series (40) and an increasingly (reversed) apodized series (41) in such a way that the decreasing and increasing elements of the two series (40, 41) form envelope curves that meet at a common intersection point (45).