Highlights the works of Akiyoshi Kitaoka that focuses on the maximization of illusory effects through standard illusions.

Archives optical illusions and ambiguous drawings of different categories.

Presents galleries of illusionary pictures and artworks. Shows relevant links and resources.

Showcases archives on illusions and images, presents optical research projects, and offers educational resources on the topic.

Annual contest which rewards the creation of new visual illusions. Showcases the finalists from this and previous years and offers information on entry.

Archive of various optical illusions that are arranged by difficulty and category.

Contains a large collection of optical illusions.

Features Java-bases applets of optical puzzles sorted by different logical and analytical categories.

Enables the creation of stereograms by selecting a foreground pattern and a mask. Also generates text-based stereograms with customized font and font size.

Features optical illusions along with explanations of how they work.

Source for optical illusions, brain teasers, games, 3D images and other mind teasing puzzles.

Showcases the museum of optical and sensory illusions. Shows the explanation of the optical phenomenon and provides scientific resources.

Features a collection of optical illusions complete with user rankings.

Highlights the collection of optical illusions, 3D street art, and flash demonstrations.

Shows artistic, puzzle, and anamorphic optical illustrations.

Discusses the optical effects found on the illusionary pictures.

Presents an article explaining the differences between the terms "optical illusion" and "visual illusion".

Displays the common optical illusions together with their explanations.