pterygium vs webeye

pterygium

noun
  • An abnormal mass of tissue in the corner of the eye that obstructs vision 

  • A generalized limb of a vertebrate 

webeye

noun
  • A superficial growth of vascular tissue radiating from the cornea over the surface of the eye 

How often have the words pterygium and webeye occurred in a corpus of books? (source: Google Ngram Viewer )