Pterygium and Pinguecula

• Both are conjunctival surface degenerations.
• They start nasally and invade laterally.
• UV light and age are important risk factors.
• The key difference is that pterygium invades into the cornea, pinguecula does not.
• Surgery is only needed in cases of pterygium where vision is obscured.

Superior Limbic Keratoconjunctivitis

• A chronic disease of the superior limbus and conjunctiva.
• It is believed to be secondary to superior bulbar conjunctival laxity which can be induced by thyroid eye disease.

Ligneous Conjunctivitis

An idiopathic chronic conjunctivitis of children, with associated systemic disease. It is characterised by recurrent ‘wood’ like pseudomembranes of the conjunctiva and other mucous membranes.

Parinaud Oculoglandular syndrome

• It is a triad of:
  • Unilateral granulomatous conjunctivitis
  • Ipsilateral preauricular lymphadenopathy
  • Fever
• It is caused by infection with Bartonella henselae