Thelazia californiensis

The·la·zi·a cal·i·for·ni·en·'sis

a nematode species occurring in the tear ducts, conjunctival sac, or under the nictitating membrane of dogs, coyotes, black bears, sheep, deer, jack rabbits, cats, and, occasionally, humans in the western and southwestern U.S.; heavy infections cause photophobia, lacrimation, eyelid edema, conjunctivitis, and even blindness.