Re:a sheet of clear yellow celophane...to improve reading.

Interesting. Yellow/black is purported to be the best constant for human vision.

i have used clear red acetate sheets to test 'readability' factors in web pages (for the visually handicapped) Red acetate reduces contrast to a large degree, so you can see when contrast is provided by color alone, and when it is provided by hue or light intensity. with this test, navy blue on light blue is still readable, but medium blue on grey often isn't. (it would be very readable by someone with normal vision, but not any one who has MD, or other problems with visual accuity, (normal aging decrease visual accuity!).

i can occationally* see Venus an hour or two after the sun comes up.. (just as i can see the moon in the day time sky) but when i was younger, i could often** see it.. now it fades.

*once or twice a year in a good year!

**two or three days in a row, till mid morning!(but still only at max a half dozen times a year!)


my other obsession