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. 2013 May 3;3(5):e002067. doi: 10.1136/bmjopen-2012-002067

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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Responses from 70 Consultant Ophthalmologists with a declared subspecialist interest in glaucoma, giving minimum (lower error bars) and maximum (upper error bars) follow-up intervals for a hypothetical patient with intraocular pressure at ‘target’ and (A) no evidence of visual field progression and no change in treatment; (B) evidence of visual field progression and no change in treatment; (C) uncertainty about visual field progression and no change in treatment. Single bars represent values for which only a single interval was given by respondents, without specifying the minimum / maximum monitoring interval.