A method of augmenting sight in an individual. The method comprises obtaining an image of a scene using a camera carried by the individual; transmitting the obtained image to a processor carried by the individual; selecting an image modification to be applied to the image by the processor; operating upon the image to create a modified image using either analog or digital imaging techniques, and displaying the modified image on a display device worn by the individual. The invention also relates to an apparatus augmenting sight in an individual. The apparatus comprises a camera, carried by the individual, for obtaining an image of a scene viewed by the individual; a display carried by the individual; an image modification input device carried by the individual; and a processor, carried by the individual. The processor modifies the image and displays the modified image on the display carried by the individual.

Disclosed in the present invention is a head-mounted electronic vision aid device and a visual distortion correction method thereof. A display unit is configured to movably display a grid/grid group, a user input unit is configured to select at least one to-be-corrected part in the grid/grid group according to the real-time image feedback information viewed by a user, when the to-be-corrected part is selected, the user input unit sends a correction control signal for performing image correction on the to-be-corrected part in a coordinate system where the grid/grid group is currently located to a processing unit, the processing unit performs calculation processing on the correction control signal to obtain variations of the to-be-corrected part before and after correction in the coordinate system, a storage unit stores plurality of combinations of the variations of the to-be-corrected part, and a display unit can display an image after visual distortion correction according to the plurality of combinations of the variations stored in the storage unit. Compared with the prior art, visual distortion correction can be achieved quickly and intuitively, and the demands of low-vision users with different symptom progresses are met.

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.

Apparatus and methods for producing narrow-band radiation in the green region of the visible spectrum are described. The narrow-band radiation may be used to aid subjects experiencing photophobia. In some cases, subjects may experience a reduction in pain (e.g., migraine photophobia) when using the narrow-band radiation.

An ophthalmic contact lens configured to treat color vision deficiency is presented herein. The contact lens includes a tinted region containing either or both of a first dye that is configured to absorb at least 50% of incident light in a spectral band between 480 nanometers to 500 nanometers and a second dye that is configured to absorb at least 50% of incident light in a spectral band between 550 nanometers to 580 nanometers. A method of manufacturing such a contact lens and a process of forming an ophthalmic contact lens by an additive manufacturing process is also presented.

An optical material for making an optical product is provided. The optical material includes a light-resistant material undergone surface modification by titanium dioxide, so that the optical product is at least resistant to light having a wavelength between 280 nm and 380 nm. The optical product and a manufacturing method thereof are also provided.

The invention relates to an optical device (FILT) for filtering light received, by polarisation or mechanically, from a medium presenting a graphic and/or textual content, characterized in that cycles of opening and closing a vision space, in a visible light spectrum, are realized periodically using the optical device (FILT) at a preset frequency Fd and in that the successive open periods each have a duration (T1) comprised in an interval of values ranging from 15 to 35% of the duration (T) of the realized cycles.

Described are polymerizable fused tricyclic compounds of formula I:

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wherein R.sup.1, R.sup.2, R.sup.3, m, n, t, and rings B, C, and D are as defined herein. The compounds absorb various wavelengths of ultraviolet and/or visible light (such as high energy visible light) and are suitable for incorporation in a variety of products, such as biomedical devices and ophthalmic devices.

The invention relates to a refractive surface for blocking short- and medium-wavelength visible-spectrum radiation that affects human physiology. The refractive surface selectively absorbs short wavelengths between 380 nm and 500 nm, between a maximum and a minimum absorption threshold, and selectively absorbs medium wavelengths between 500 nm and 590 nm, between a maximum and a minimum absorption threshold, the selective absorption of short and medium wavelengths between 380 nm and 590 nm not completely blocking the passage of visible light in this range. Other embodiments include an LED screen, a software product and an electronic device, and ophthalmic, intraocular or sunglass lenses.

Embodiments concern an optical eye-contact device comprising a lens body having a symmetry axis and which further comprises a light-transmissive portion and an opaque portion, wherein the light-transmissive portion is decentered with respect to the symmetry axis.