E.Z. Blumenthal and S. Frenkel

Invest Ophthalmol Vis Sci 2003;44: E-Abstract 3390. © 2003 ARVO 3390 – B93
Dept of Ophthalmology, Hadassah University Hospital, Jerusalem, Israel
Commercial Relationships: E.Z. Blumenthal, Laser Diagnostic Technologies F; S. Frenkel, None.


PURPOSE: To evaluate the inter-device reproducibility of retinal nerve fiber layer (RNFL) thickness measurements obtained with the commercially available GDx-VCC, a scanning laser polarimeter with variable (individualized) corneal compensation.

METHODS: One eye each, from three normal subjects was tested on 13 different GDx-VCC devices, on the same day, by an experienced operator. Reproducibility for each of 5 GDx parameters was calculated.

RESULTS: For each of five tested GDx parameters, the averaged standard deviation (µm), coefficient of variation and 95% confidence interval range (µm), respectively, were: TSNIT average: 3.18µm, 5.06%, 3.84µm; superior average: 3.99µm, 5.27%, 4.82µm; inferior average: 4.55µm, 6.08%, 5.50µm; TSNIT standard deviation: 1.89µm, 8.63%, 2.92µm; the Number (also referred to as nerve fiber indicator): 4.71, N/A, 5.69. For each of the 5 GDx parameters, repeated measures ANOVA was non-significant for inter-device differences.

CONCLUSIONS: With the commercially available GDx-VCC our results indicate that the RNFL measurements appear reproducible across devices.

Keywords: imaging/image analysis: clinical imaging methods (CT, FA, ICG, MRI, OCT, RTA) clinical (human) or epidemiologic studies

גלאוקומה וקטרקט:



אתר זה נכתב ע”י פרופ’ איתן בלומנטל. באתר תמצאו אינפורמציה מעמיקה על האבחון והטיפול בגלאוקומה ובקטרקט. האינפורמציה באתר איננה תחליף לייעוץ רפואי.

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ORIGINAL RESEARCH PAPERS Blumenthal EZ. Adjusting the slit-lamp oculars: An unnecessary burden or a must?  Survey of Ophthalmology 1995;40(3):225-228. Abstract Full-text (PDF) Blumenthal EZ, Serpetopoulos...
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Adjusting The Slit-Lamp Oculars: An Unnecessary Burden Or A Must?
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On Focusing The Slit-Lamp: Part I. An Inaccurate Ocular Setting–What Is There To Lose?
Blumenthal EZ, Serpetopoulos CN. Surv Ophthalmol. 1998 Jan-Feb;42(4):351-4. Department of Ophthalmology, Hadassah University Hospital, Jerusalem, Israel. ABSTRACT: Adjustments of the diopter rings on the...
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Glaucomatous-Like Cupping Associated With Slow-Growing Supra-Sellar Intracranial Lesions
Blumenthal EZ, Girkin CA, Dotan S. Neuro-Ophthalmology. 2006;30:111-115. Department of Ophthalmology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel. eblumenthal@md.huji.ac.il ABSTRACT: PURPOSE:...