Originally Posted by kaptondave
I have a pair of older eyes also and have problems keeping track of it at times, especially against a milky sky. I have done some tests of visibility enhancements and have concluded that the best is to just paint the bottom of the wing a solid dark color. My eyes cannot discriminate stripes and high-vis colors at a distance.
Here is a source for prismatic tape that I have used on the leading edge of the wings. It is pretty good at catching the sun and giving a glint.
+1 on the dark color. I painted one wing black and one flourescent green on my old radian and the black wing showed up much better. My new radian now has two black wings and is very easy to see.