Eyeball

Eyeball is a 1975 giallo film co-written and directed by Umberto Lenzi, and starring John Richardson, Martine Brochard, Ines Pellegrini, Andrés Mejuto, Mirta Miller, George Rigaud, Raf Baldassarre, Silvia Solar and Daniele Vargas. It was an international co-production between Italy and Spain, and follows a group of American tourists in Barcelona who are stalked by a killer who removes their victims' eyes.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.