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PurposeThe purpose of this audit was to determine the most common medication related prescription errors in ophthalmic practice, to determine avoidable prescription errors and evaluate the effect of preventative methods against these errors.MethodsThe first audit was conducted prospectively over a four week period in Oct 2009 and a re-audit after 6months on May 2010, to determine the effects of preventative measures suggested in the first audit.ResultsThere were 4.7% (29/623) prescription errors during the initial four week audit period. A method of check and counter check of prescriptions was implemented and re-audit showed a reduction in incidence of errors to 0.77% (5/651) errors.ConclusionsThe majority of prescribing errors occurred at the stage of writing the prescription and our findings suggest that the intervention of check and counter check can reduce the rate of error significantly.

Introduction We describe a unique case of dural optic nerve sheath calcification with areas of parenchymal intracranial calcification. Case history A 74 years old Afro-Caribbean male presented with the history of puffiness under the lids associated with left ptosis. He has right eye Amblyopia. Fundus examination revealed slightly pale and more cupped left disc compared to the right optic disc. CT scan with contrast of the orbit and brain revealed dural optic sheath calcification with areas of relatively symmetrical parenchymal intracranial calcification and with normal serum investigations. Discussion None of the previous reported cases had brain parenchymal calcification. Our case is unique that he not only had dural optic nerve sheath calcification but also had intracranial brain parenchymal calcification.