Around the age of 77 years old, Joe Biden's eyes suddenly chnaged from very blue to brown.
I've mentioned this to people and they just shrug their shoulders and say "must be eye cintacts."
So all if his 77 years of life he was happy with bright blue eye and as he's approaching 80 he thinks "brown is better." So he buys brown contacts and never skips a day going back to blue.
Have you ever heard of such a thing before?
If you are being given psychotropic drugs that cause your pupils to dilate extensively, you will need to mask them with a colored contact lens. Blue may be too light to perform the masking (and might let too much light through, to blind Biden in harsh daylight or artificial light). How do you think he would look with pupils the size of dimes? Can't have that.