June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Detectability of Visual Field Defects using 0.5 Degree Interval in High Resolution Perimetry and OCT Findings
Author Affiliations & Notes
  • Takuya Numata
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Chota Matsumoto
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Sachiko Okuyama
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Sonoko Takada
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Fumi Tanabe
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Shigeki Hashimoto
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Mariko Eura
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Tomoyasu Kayazawa
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
  • Eiko Koike
    Sakai Hospital Kinki University Faculty of Medicine, Sakai, Japan
  • Yoshikazu Shimomura
    Ophthalmology, Kinki University Faculty of Medicine, Osaka-Sayama, Japan
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 1886. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Takuya Numata, Chota Matsumoto, Sachiko Okuyama, Sonoko Takada, Fumi Tanabe, Shigeki Hashimoto, Mariko Eura, Tomoyasu Kayazawa, Eiko Koike, Yoshikazu Shimomura; Detectability of Visual Field Defects using 0.5 Degree Interval in High Resolution Perimetry and OCT Findings. Invest. Ophthalmol. Vis. Sci. 2013;54(15):1886.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose: Visual field testing was performed using 0.5 degree interval in high resolution perimetry to assess detectability of visual field defects which were corresponded to OCT findings. Next, detectability of glaucoma-related visual field defects was investigated using measuring points of various intervals.

Methods: The subjects were 15 eyes of 15 patients with glaucoma and 15 eyes of 15 normal subjects. Octopus 900 Custom test program was used with the target size 3 and background luminance of 31.4asb. Measuring points were placed on the meridian of 45 degree superior-temporally between the fixation point and the eccentricity of 30 degrees and visual field at each measuring point was assessed three times with the interval of 0.5 degree and high degree visual field profile was obtained. The blind spot was detected using Octopus 900 Custom test with the target size 1, the background luminance of 31.4asb, target luminance of 1000asb, and a grid pattern of 1 degree interval. Visual field was overlapped exactly to fundus findings by matching the blind spot with the visual angle of the fixation point in visual field and the center of the disc and fovea in scanning laser ophthalmoscope (SLO). The corresponding structural findings were assessed using Cirrus HD-OCT with HD 5 Line Raster (1 line), 9 mm, High Definition Images. In normal eyes, visibility at retinal vessels was examined. In glaucoma cases, visual field profile was obtained using different degree intervals in 17 patterns from 0.5 degree to 8.5 degrees. Mean defect (MD), square root of loss variance (sLV) and maximum sensitivity decline amount in all degree intervals were examined.

Results: In all the normal eyes, visual field testing with 0.5 degree interval presented decreased sensitivity caused by blood vessels by the average and maximum of 1.1dB, and 4dB. In the glaucoma cases, the detectability of visual field defects decreased when measuring points were located at intervals larger than 2 degrees, 3 degrees, and 6 degrees; at the eccentricity smaller than 10 degrees, 10 to 20 degrees, and 20 to 30 degrees, respectively, however, the advanced cases were least affected.

Conclusions: Detectability for glaucoma-related visual field abnormality is greatly affected by the measuring point density. The higher resolution perimetry is desirable at the central visual field.

Keywords: 758 visual fields • 642 perimetry • 552 imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound)  
×
×

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.

×