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How to elicit Conjunctival reflex?

Method of elicitation
  • Stand on one side of the subject and ask him to look at a far object on the opposite side.
  • A sterile piece of cotton is twisted into a wisp and bring it from the back of the subject avoiding his visual attention.
  • Touch the conjunctiva and see the response. Both eyes are separately tested.
  • Observation: Bilateral closure of the eyes. Reflex pathway
  • Receptors: Touch receptors of the conjunctiva
  • Afferent limb: Ophthalmic division of trigeminal nerve
  • Efferent limb: Facial nerve
  • Effector muscle: Orbicularis oculi
  • Centre - Pons (Nucleus of Trigeminal Nerve)