Eyes....

[kinyonga]

Eye use/body motion...
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0070761

Eye movements not truly independent...
http://jeb.biologists.org/content/218/13/2097

Swollen eyes...
https://www.researchgate.net/public...ed_with_Foleyella_sp_infection_in_a_chameleon

Just for fun...
https://www.amazon.ca/Uncle-Milton-Chameleon-Vision-Goggles/dp/B00BJ4JX22