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A pinguecula consists of an abnormal degeneration of the collagen fibers in the conjunctival stroma.

  • They present in a variety of forms
  • Characterized by a nodular shape
  • May enlarge slowly over time
  • Most lesions are benign and do not require treatment
  • Normal pinguecula can become inflamed

A pterygium is a fibrovascular degeneration of the conjunctiva.

  • Characterized by wedge shape
  • Chronic ocular discomfort is possible
  • Associated with dry eye syndrome
  • Associated with ultraviolet light exposure