These are a small set of measles frequencies,
measles German 70 240 600 7220 (1322-5 4275 5559-5 6900 8750 9364-2) Hz
measles 60 260 750 2250 7500 (5250 3710-5 6876-2) Hz
and
Measles Body Encephalitis 50 1520 5690 (5515 3750-3 4799-3 5270 6627-1 7890 9872-3) Hz
all of which can affect vision.
Good luck.