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:: Volume 19, Issue 4 (Iranian Journal of Ophthalmology 2007) ::
2007, 19(4): 21-27 Back to browse issues page
Intraobserver Reproducibility of Retinal Nerve Fiber Layer Measurements Using Scanning Laser Polarimetry with Variable Corneal Compensation in Glaucoma Suspect Patients
Heidar Amini Dr. *, AliReza KhodaBande Dr., Sasan Moghimi Dr., Yadollah Eslami Dr., Reza Zarei Dr., Ghasem Fakhraie Dr.
, heydar_amini@yahoo.com
Abstract:   (18452 Views)

Purpose: To quantify the intraobserver reproducibility of retinal nerve fiber layer (RNFL) measurements using scanning laser polarimetry with variable corneal compensation in glaucoma suspect patients.

Methods: Twenty-six eyes of 26 glaucoma suspect patients were included. Complete ophthalmologic examination and standard automated perimetry were performed for all of them. RNFL measurements were done using GDx-VCC (Laser Diagnostic Technologies, San Diego , CA ) by an experienced operator. The test repeated immediately by the same operator.

Results: Patients were 24 to 70 years old (55.9±11.5 years). Twenty patients were female and 6 patients were male. Eighteen patients were ocular hypertensive and 8 patients had large cup to disk ratios. None of them had glaucomatous field defect in standard perimetry. The mean coefficient of variation for measurements of TSNIT average (Avg), superior Avg, inferior Avg, TSNIT-SD and nerve fiber indicator (NFI) were 0.77, 0.95, 0.91, 0.81, and 0.98 respectively. The mean coefficient of variation of GDx-VCC was 88.4 for the 5 main parameters (TSNIT Avg, superior Avg, inferior Avg, TSNIT-SD, and NFI).

Conclusion: GDx-VCC showed a good test-retest correlation and acceptable intraobserver reproducibility. NFI may be the most reproducible major GDx-VCC parameter in glaucoma suspect patients.

 

Iranian Journal of Ophthalmology 200719(4):21-27
Keywords: scanning laser polarimetry, reproducibility, GDx-VCC, glaucoma suspect
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Type of Study: Original | Subject: General
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Amini H, KhodaBande A, Moghimi S, Eslami Y, Zarei R, Fakhraie G. Intraobserver Reproducibility of Retinal Nerve Fiber Layer Measurements Using Scanning Laser Polarimetry with Variable Corneal Compensation in Glaucoma Suspect Patients. Iranian Journal of Ophthalmology. 2007; 19 (4) :21-27
URL: http://irjo.org/article-1-134-en.html


Volume 19, Issue 4 (Iranian Journal of Ophthalmology 2007) Back to browse issues page
مجله چشم پزشکی ایران Iranian Journal of Ophthalmology
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