Into the Sun

We had gone to the NC beach for the weekend, and had to bug out because of
the hurricane threat. I was worried that even if the hurricane didn't head
right for us, that the outlying winds might get strong enough to prevent us
from departing.

Despite the winds Saturday evening (15 G 25), we had a smooth departure and
headed back towards Atlanta, getting a smooth ride and a bit of a tailwind
for most of the flight. The one thing we didn't have in our favor was
visibility. We were literally headed right into the setting sun for 2 hours.
The haze didn't help. I felt a little better about traffic avoidance because
we were using flight following, but I had a truly miserable time looking
into the sun for the whole flight, despite my sunglasses.

By the time we neared home, my pupils had contracted to the point that I was
having real problems getting them to open up enough to see the panel, which
is flat black. On this evening, it was sea of black with a bright orange
ball perched on top, and the instruments barely visible. As soon as we
changed course to enter the pattern at our home field, everything was
better...

Other than picking a course that isn't into the sun, or choosing a better
time to fly, is there any cure for the sun in the eyes problem?