An early Sorting Test devised by Englishman F.W. Edridge-Green around 1885. This test consists of a wooden box with four holes labeled: red, yellow, green and blue. There are also ~100 colored beads that each correspond to one of the…

A type of Lantern used for color vision testing, developed in 1891 by Frederick William Edridge-Green (1863-1953). Although rejected by the intended user, the UK Board of Trade in favor of Holmgren's Wool, this Lantern was eventually adopted by The…

The general scientific name for Light, which includes Visible Light, Radio Waves, Ultraviolet, etc. It is defined by its wavelength. Visible Light is spans the range of wavelengths from 400-700nm (can be broader depending on practical thresholds).

Electromagnetic Radiation organized in order of Wavelength, From Gamma Rays to Radio Waves, with Visible Light in the middle. The Visible Spectrum is a subset of the Electromagnetic Spectrum. From Wiki user Sakurambo

Electroretinography measures the electrical responses of various cell of the retina, namely the Photoreceptors (Rods and Cones. A standard flash of light is emitted on to the retina and the resulting electrical pulse is measured using electrodes on the surface…

A section of a Photoreceptor in the Inner Segment that contains the mitochondria. Photoreceptors are the most power-hungry cells in the body, so put a high demand on Mitochondria. When mitochondria functions begin to decline, this leads to a worsening…

The leading manufacturer of Color Correction Lenses. EnChroma glasses help to enhance color vision for the Color Vision Deficient and Color Normals. They can do this by increasing the saturation of some colors by using a notch filter to remove…

The "true" definition of white, which contains equal energy at every Wavelength. The Spectrum is therefore a horizontal line. The color of EEW is the Neutral Point (or White Point). However, Equal Energy White has Metamers that are also on…

An extra-spectral color is any color that cannot be excited by a single wavelength of light. They are not on the Spectral Locus and therefore are not Spectral Colors. "All the colors of the rainbow" are Spectral Colors, but every…

A device (body modification apparatus) that is designed to allow people to perceive color through sound waves. A head-mounted sensor detects the color of an object and converts it in real-time into sound waves through bone conduction. The first eyeborg…