Question: why are pugs eyes so big?
Answer: It happens when pressure on the eyelid causes the globe (or eyeball) to "pop" out of the socket. ... Proptosis is most common among brachycephalic breeds, or short-snouted breeds with shallow eye-sockets, like pugs, French bulldogs and Boston terriers. "They tend to have these big bulging eyes," Krafchik said.