Brian,
Could be your lizard just got something in it's eye that is causing irritation and swelling. However, it could also be related to something more severe like a systemic bacterial infection of some sort. Your best bet would be to take it to a vet before you begin to have a worsening of the condition.
-----
Matt Campbell
Animal Keeper, Small Mammal/Reptile House
Lincoln Park Zoo Chicago, Illinois
Assistant Curator
Wildlife Discovery Center at Elawa Farm
Lake Forest, Illinois


