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Visual acuity and pupillary reactions after peribulbar anaesthesia.
  1. S J Talks,
  2. N H Chong,
  3. J M Gibson and
  4. I R Francis
  1. Department of Ophthalmology, East Birmingham Hospital.

    Abstract

    The effect of peribulbar anaesthesia on optic nerve function in 20 patients, before and after cataract surgery, was measured. All the patients had decreased visual acuity. Five (25%) had no perception of light. Seventeen (85%) developed a relative afferent pupil defect (RAPD). No patients saw the operating instruments. Seven (35%) had improved visual acuity immediately postoperatively. Patients should be warned that they may lose vision completely on being given a peribulbar anaesthetic; however their vision will improve, but not necessarily immediately, postoperatively. Examination for an RAPD is a good method of providing reassurance that the operating instruments will not be seen.

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