Misleading axial length measurements with the IOLMaster due to a dense posterior vitreous surface membrane and a macular edema in a diabetic patient

  • Christoph Fidel MayerEmail author
  • Navid Ardjomand
  • Werner Wackernagel
  • Michaela Velikay-Parel
Letter to the Editor

Dear Editor,

Exact biometry is an essential component in cataract surgery to obtain accurate refractive results [1]. The IOLMaster® is a precise and common instrument to obtain axial length [2, 3, 4, 5]. We describe a case of a patient with diabetic retinopathy in which the IOLMaster® was not able to determine an axial length. Clear signals from a dense posterior membrane as well as from retinal pigment epithelium (RPE) and macular edema were received.

A 46-year-old female with severe proliferative diabetic retinopathy on both eyes was referred to our department. Vision was 20/25 in the right eye and 20/200 in the left eye. A combined vitrectomy with cataract surgery was planned, and axial length measurements were taken with the IOLMaster® (Vers.: 3.01.0294; Zeiss, Germany).

Measurements on the right eye revealed different values—all with SNR greater than 2.0, an indicator for a valid reading [ 6]. Medians of the values were 21.28 mm (range 21.25 to 21.28 mm, total of eight...


Diabetic Retinopathy Retinal Pigment Epithelium Macular Edema Axial Length Proliferative Diabetic Retinopathy 
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We thank Dr. A. Borkenstein for providing clinical data.

Conflict of interest

None of the authors have any financial/conflicting interests or funding source to disclose.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Christoph Fidel Mayer
    • 1
    Email author
  • Navid Ardjomand
    • 1
  • Werner Wackernagel
    • 1
  • Michaela Velikay-Parel
    • 1
  1. 1.Department of OphthalmologyMedical University Graz, AustriaGrazAustria

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