Some scientific reports were published recently that anyone who's interested in preserving their vision should be interested in.
tl/dr (too long / didn't read): 3 minutes of deep red light (670 nanometers, not quite infrared), applied to the eyes in the morning, helps older eyes improve the ability to perceive colors.
Someone emailed me about setting up a "Cyber Monday" special. I'm a little late, but ... "sure". Click the link above for the 'sale'. :)