Converting TTL monitor to Analog ( Screen Flicker)(Human visu al response OT)

Actually the human visual response in variable depending on what part of the field of vision is used. I can and many people can see flicker using your peripheral vision. Pointing your head away from the screen about 60 degrees and looking at the screen from the corner of you eye you can commonly see flicker. Rods and cones in you eye respond differently to color, flicker, and light levels. There are whole books on human visual response and lots of study of the field when looking at Radiological images. The new "hot topic" is Radiology is "soft-copy" reading of medical images, skip the film use a computer monitor. The problem is that clinical quality monitors cost $10,000-$20,000. Everybody want consumer grade monitors with the associated low cost. Brightness variability across the screen is routinely 25%. Examining images for lung cancer nodules or mammography lesions are examples. There is a huge equation that lists visual response which is tied to brightness, apparent contrast, wavelength, and size. Lots of human response is below the "threshold of awareness". If you can obviously see the lung nodule then your chances of treatment and 5 year longevity are reduced. Mike mmcfadden(a)cmh.edu