December 2002
Volume 43, Issue 13
Free
ARVO Annual Meeting Abstract  |   December 2002
Detecting Early Glaucoma by Visual Field Parameters
Author Affiliations & Notes
  • P Fogagnolo
    University of Milan Eye Clinic Milan Italy
  • N Incarnato
    University of Milan Eye Clinic Milan Italy
  • LM Rossetti
    University of Milan Eye Clinic Milan Italy
  • S Miglior
    University of Bicocca Eye Clinic Monza Italy
  • N Comi
    University of Milan Eye Clinic Milan Italy
  • N Orzalesi
    University of Milan Eye Clinic Milan Italy
  • Footnotes
    Commercial Relationships   P. Fogagnolo, None; N. Incarnato, None; L.M. Rossetti, None; S. Miglior, None; N. Comi, None; N. Orzalesi, None.
Investigative Ophthalmology & Visual Science December 2002, Vol.43, 1074. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      P Fogagnolo, N Incarnato, LM Rossetti, S Miglior, N Comi, N Orzalesi; Detecting Early Glaucoma by Visual Field Parameters . Invest. Ophthalmol. Vis. Sci. 2002;43(13):1074.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Abstract: : Purpose: To evaluate the sensitivity (Sn) and specificity (Sp) of different perimetric techniques in discriminating normal from glaucomatous eyes and to calculate the ability of visual field parameters in detecting the presence of RNFL defects. Methods: Twenty-three eyes of 23 patients with focal wedge-shaped RNFL defects, as shown with Scanning Laser Ophthalmoscope (SLO, Rodenstock), and with normal standard automated perimetry (SAP) indices (MD and CPSD) were assessed for the presence of glaucoma according to optic disc appearance; glaucoma was diagnosed if there was agreement between two masked evaluators. All patients underwent SAP (full threshold 30-II), blue-yellow (B-Y) perimetry (full threshold 30-II) and frequency doubling technology (FDT) perimetry (full threshold N-30). The last of 3 consecutive tests was considered in the analysis to avoid any "learning effect". Results: According to optic nerve head appearance, 10/23 eyes (43.4%) were diagnosed as having glaucoma. The best perimetric parameters in detecting glaucoma were: cluster of at least 2 contiguous points in the pattern deviation (p<5%) with FDT: Sn=80%, Sp=62%; cluster of at least 2 contiguous points in the pattern deviation (p<5%) of the FDT superior hemifield: Sn=70%, Sp=77%; cluster of at least 2 contiguous points in the pattern deviation (p<5%) of the FDT inferior hemifield: Sn=60%, Sp=92%; cluster of at least 3 contiguous points in the pattern deviation (p<5%) of the B-Y superior hemifield: Sn=60%, Sp=54%. Both B-Y total deviation map (p<5%) and FDT pattern deviation map (p<5%) could detect 56.5% of the RNFL defects. Conclusions: In a very selected population of subjects with wedge shaped RNFL defects and normal SAP indices, FDT seems to be more sensitive and specific than B-Y for the detection of early glaucoma. In 17.4% of eyes neither optic disc examination nor any perimetric parameter could detect the presence of RNFL defects.

Keywords: 484 nerve fiber layer • 624 visual fields 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×