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Are biometric parameters a risk factor for idiopathic macular hole formation? Results of a matched case-control series
  1. S P Shah1,
  2. C Bunce2,
  3. R L Johnston3,
  4. D A H Laidlaw4
  1. 1Vitreoretinal Speciality, Eye Department, St Thomas’s Hospital, Lambeth Palace Road, London SE1 7EH, UK
  2. 2Moorfields Eye Hospital, London, UK
  3. 3Cheltenham General Hospital, Cheltenham, Sandford Road, Cheltenham GL53 7AN, UK
  4. 4St Thomas’s Hospital, Lambeth Palace Road, London SE1 7EH, UK
  1. Correspondence to: Shaheen P Shah MRCOphth, Ophthalmology, Vitreoretinal Speciality, Eye Department, St Thomas’s Hospital, Lambeth Palace Road, London SE1 7EH, UK; shaheen_shah{at}hotmail.com

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Recognised risk factors for the formation of idiopathic full thickness macular holes (IFTMH) include age, female, sex, and high myopia.1,2 However, we noticed that patients with IFTMH within our population, tended to have shorter than normal axial lengths. An age and sex matched case-control study was therefore performed to test this hypothesis and determine whether biometric factors may be associated with formation of IFTMH.

Methods

Consecutive patients undergoing surgery for IFTMH had age, sex, axial length in millimetres (mm), and corneal keratometry (K) measurements in dioptres (D) recorded.

For each case three age and sex matched controls were randomly identified from a cataract surgery database (Medisoft). Biometric measurements were made in all cases and controls using the IOL-Master …

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