Vision Enhancement Technologies
Visionics markets a low vision enhancement system (LVES). This is a portable head mounted instrument for individuals with low vision. Visionics also markets a monocular version of the LVES called Aurora. Another system is called V-Max, which is manufactured by Enhanced Vision Systems; 1-800-440-9476.
Low Vision Enhancement System (LVES, pronounced Elvis) was developed by Dr. Robert Massof and Jim Deremeik of the John Hopkins Lions Vision Research and Rehabilitation Center. Also see the discussion on bioelectronic vision. A headset that uses computer and video technology allows images to be projected inside the headset in front of the eyes. This brings objects in closer for examination. Contrast can be adjusted. A cane or sighted guide is often still needed for navigation because the device does not monitor the ground. Future hopes for the device include a more compact, less expensive, lighter unit with color capability.
Night scope technologies: These are evolving very fast, becoming smaller and cheaper every year. There are several companies developing commercial scopes. As an example, check out the Night Mariner 260 (ITT Night Vision, $2,495). Also take a look at Tasco Night Scopes. A comprehensive book called Night Vision is available through Cambridge University Press, published in 1994, and edited by Hess, Sharpe, and Nordby. There is also a comparative discussion of these aids in the magazine Powerboat Reports, May, 1994.
Color recognition systems: These are possible (like the American printing House light sensor, but I know of no manufacturer at this time.