Original: Ophthalmosaurus ( meaning '' eye lizard '' in Greek ) was an ichthyosaur of the Middle to Late Jurassic period ( 165 to 145 million years ago ) , named for its extremely large eyes .
Simplified: Ophthalmosaurus was an ichthyosaur of the Late Jurassic period ( 165 to 150 million years ago ) , named for its extremely large eyes .