Authority Websites
 + Health
  + Optical

All Optical Illusions - Gallery of optical illusions, 3d art, puzzles, and visual gags.
B&K Optical Tools & Supplies LLC - Suppliers of measuring devices, frame parts, tools and accessories, with company information and contact details. Phoenix, Arizona, USA.
Optical Illusions? - Comments on the terms 'Optical Illusion' and 'Visual Illusion'.
Aram Optical Co. - Manufacturers and exports optical frames and sunglasses from Korea.
Asia Optical Manufactory Ltd. - Manufactures standard and custom eyewear in China.
BK Optical USA - US manufacturer of sunglasses and optical frames, jewelry and optical hinges, frame coloration, lorgnettes.
B Robinson Optical, Inc. - Designer and manufacturer of sunglasses, optical frames and reading glasses. Also offers private label products.
Cool Optical Illusions - A growing collection of optical illusions and eye tricks, including original illusion pictures and a collection of optical illusion desktop wallpaper.
Planetary Society Announces Support for Optical SETI - The Planetary Society announced this week that it will support three projects that plan to look for evidence of extraterrestrial intelligence at visible light, not radio, wavelengths.
Eluzions' Optical Illusions - Contains many optical illusions, illustrating a wide range of visual anomalies and surprising optical effects. A free screensaver, posters, and educational explanations are also provided.
Electro-Optical Products Corporation - Manufactures optical modulators, choppers, shutters, scanners, galvos, and drivers. New York
Eyetricks.com - Collection of illusions and other mind teasing oddities. Includes illusions that you can make.
Just Optical Illusions - Focus on geometric optical illusions by Gianni A. Sarcone and Marie J. Waeber
Glass-prism.com - Thanks for visiting our site glass-prism.com where you can get assistance on glass prism. At this site we offer assistance with glass prism. As well as information for glass prism we also offer the best sites on health and fitness, health and fitness. This makes glass-prism.com the best guide on glass prism on the Internet. Click on the websites related to glass prism as follows.
Optical Magic Optical Illusions - A selection of common images.
Guild Optical Associates, Inc. - Manufacturer of custom lenses, windows, mirrors, and optics. Specializes in sapphire optics. New Hampshire.
Hana Optical - Korean manufacturer of metal eyeglass frames and sunglasses.
Eye Magic: Optical Illusions - Offers a number of optical illusions for viewing, as well as explanations on how they work.
Hyun-Jin Optical Co. - Manufactures optical frames in Korea.
Hou Gine Optical Manufactory Company - Established in 1983 with a manufacturing plant in Hong Kong. Provides products with photos, company overview and contact information.
Optical illusions to fool your eye - A selection of optical illusions including an optical illusion quiz.
Optical Illusions Etc - Contains many optical illusions in blog format.
Optical Illusions for Kids - Offers a collection of illusions, brain teasers, and puzzles for children.
Jackson Optical Manufactory - Manufacturer and distributor of a variety of metal, plastic and sunglass frames for over 20 years. Includes photos of products, company profile and contact information. Site is in English, Spanish and Portugues.
Keystone View Optical Division - Manufacture of professional vision products including vision screeners, telebinoculars, vision tests, and educational programs.
Knight Optical - Optical components custom made and designed, off the shelf components are also available.
LBI Optical Manufactory - Manufacturers a wide range of value priced designer eyeglass frames, eyeglass cases, and lenses
Mchael Bach: Optical Illusions & Visual Phenomena - The stress here is on relative novelty and interactivity, in combination with a scientific background. Regularly updated.
Cambridge Optical Aperture Synthesis Telescope - A multi-element optical interferometer with baselines of up to 100 meters, designed to observe stars with angular resolution as high as one thousandth of one arcsecond.
NIEHS Kids Page -- Optical Illusions - Presented by the National Institute of Environmental Health Sciences. A collection of illusions.