What Is a Conjunctival Sac (with Pictures)?







What is a conjunctival sac (with pictures)?

The conjunctiva (the noun form of conjunctival) is the clear, thin membrane that covers part of the front surface of the eye and the inner surface of the eyelids. The conjunctiva typically includes three parts:

  • Palpebral or tarsal conjunctiva
  • Bulbar or ocular conjunctiva
  • Fornix conjunctiva

Illustration of the conjunctiva of the eye

The conjunctiva helps lubricate the eye by producing mucus and tears. It also contributes to immune surveillance and helps to prevent the entrance of microbes into the eye. The conjunctival sac is the potential space lined by conjunctiva between the eyelids and the eyeball (see pictures below).

Conjunctival Sac


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