BMJ 1995; 311 doi: https://doi.org/10.1136/bmj.311.7014.1230b (Published 04 November 1995) Cite this as: BMJ 1995;311:1230
  1. Wallace S Foulds,
  2. Angus C Maccuish
  1. Emeritus professor of ophthalmology University of Glasgow, Glasgow G12 8QQ
  2. Consultant physician Glasgow Royal Infirmary, Glasgow G4 0SF

    EDITOR,--Undoubtedly, diabetic retinopathy remains an important cause of preventable blindness, but Bob Ryder's statement that ophthalmoscopy alone will miss up to two thirds of sight threatening cases is misleading.1 In support of this view Ryder quotes our study of 1983 among others, but he misquotes our results.2

    In our study the sensitivity of detection of any form of retinopathy, including background …

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