Specialized in creating optical-illusions

Illusions teaching concepts of color and vision

Vision therapy software developed by optometrists to fight against unpleasant symtoms

Optical illusions, scientific toys, visual effects, and even a little magic

Exampples and explanation of pictographic, stereographic, and 3D distortion, as well as color/contrast effects

From a temporary exhibit at Heureka

Makers of digital confocal microscopy workstations and SlideBook 2D/3D image processing and microscope control software for MacOS and Windows '95

Magical illusions in art, literature, music, mathematics, social science, and virtual reality

Specialized in optical illusions

Specializing in multispectral and hyperspectral imaging systems/software for airborne remote sensing, and parallel non-invasive systems for biomedicine

Collection of images by M.C. Escher, as well as other optical illusions and tesselations

A gallery of various illusions

HUNDREDS OF ILLUSIONS! Our Illusion Site is growing fast and has quickly become the largest collection of illusions on the internet

An online collection of colorful optical illusions without a lot of 'deep' science. Includes many interactive demonstrations, science projects, art, books, games, puzzles and more

Design and manufacture optical choppers and lock-in amplifiers

Studies the ultrafast dynamics of optical fields and of field matter interactions

Famous Dutch graphic artists: geometric tilings, spatial illusions, essays and stories

Engineers and designs custom lens, instruments, and optical systems