A pinguecula is a yellowish non-cancerous growth on the surface of the cornea. Generally, they will form in the corner of the eye near the nose, although they may occur elsewhere. 

 A pterygium is an eye growth that occurs on the cornea of the eye. The growth is a pinkish, triangular shaped tissue growth. It generally grows slowly, starting from the corner of the eye and moving towards the cornea. In advanced stages, it could interfere with the patient’s vision by inducing astigmatism or obscuring the pupil area.