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Br J Ophthalmol 2009;93:61-65 doi:10.1136/bjo.2008.137653
  • Original Article
    • Clinical science

Quantitative assessment of lens opacities with anterior segment optical coherence tomography

  1. A L Wong1,
  2. C K-S Leung1,2,
  3. R N Weinreb2,
  4. A K C Cheng1,
  5. C Y L Cheung1,
  6. P T-H Lam1,
  7. C P Pang1,
  8. D S C Lam1
  1. 1
    Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, PR China
  2. 2
    Hamilton Glaucoma Center, University of California, San Diego, La Jolla, California, USA
  1. Dr C K-S Leung, Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong Eye Hospital, 147K Argyle Street, Kowloon, Hong Kong; tlims00{at}hotmail.com
  • Accepted 20 August 2008
  • Published Online First 6 October 2008

Abstract

Aim: To evaluate the reliability of lens density measurement with anterior segment optical coherence tomography (OCT) and its association with the Lens Opacity Classification System Version III (LOCS III) grading.

Methods: Fifty-five eyes from 55 age-related cataract patients were included. One eye from each subject was selected at random for lens evaluation. After dilation, lens photographs were taken with a slit lamp and graded against the LOCS III standardised condition. Anterior segment OCT imaging was performed on the same eyes with a high-resolution scan. The association between the anterior segment OCT nucleus density measurement and LOCS III nuclear opalescence (NO) and nuclear colour (NC) scores was evaluated with the Spearman correlation coefficient. Anterior segment OCT measurement precision, coefficient of variation (CVw), and intraclass correlation coefficient (ICC) were calculated.

Results: The mean NO and NC scores were 3.39 (SD 1.10) and 3.37 (SD 1.27), respectively. Significant correlations were found between anterior segment OCT nuclear density measurements and the LOCS III NO and NC scores (r = 0.77 and 0.60, respectively, both with p<0.001). The precision, CVw and ICC of anterior segment OCT measurement were 2.05 units, 4.55% and 0.98, respectively.

Conclusion: Anterior segment OCT nucleus density measurement is reliable and correlates with the LOCS III NO and NC scores.

Footnotes

  • Competing interests: CL and RW have received research support in the form of instruments from Carl Zeiss Meditec. RW is a consultant to Carl Zeiss Meditec.

  • Ethics approval: Ethics approval was provided by the Clinical Research Ethics Committee (Kowloon Central/East).

  • Patient consent: Obtained.

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