Related Experiment Video
Updated: Jun 28, 2026
07:45
Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
Published on: July 21, 2020
Visual function-specific perimetry to identify glaucomatous visual loss using three different definitions of visual
Ali Tafreshi1, Pamela A Sample, Jeffrey M Liebmann
1Department of Ophthalmology, Hamilton Glaucoma Center, University of California at San Diego, La Jolla, California 92093-0946, USA.
Investigative Ophthalmology & Visual Science
|November 4, 2008
Summary
Confirming visual field (VF) abnormality is crucial. Standard automated perimetry (SAP) confirmed by a repeat SAP or short-wavelength automated perimetry (SWAP) test offers optimal detection of glaucoma.
Area of Science:
- Ophthalmology
- Glaucoma diagnostics
- Visual field testing
Background:
- Glaucoma diagnosis relies on detecting visual field (VF) abnormalities.
- Comparing different perimetry techniques is essential for accurate diagnosis.
- Standard automated perimetry (SAP), short-wavelength automated perimetry (SWAP), and frequency-doubling technology (FDT) are common methods.
Purpose of the Study:
- To compare the diagnostic performance of SAP, SWAP, and FDT.
- To evaluate three definitions of visual field abnormality: single-test, same-test confirmed, and different-test confirmed.
- To determine the optimal method for confirming visual field defects in glaucoma.
Main Methods:
- Utilized data from 174 glaucoma patients and 164 controls.
- Performed two reliable 24-2 SAP-SITA, SWAP-SITA, and Matrix FDT tests per participant.
- Generated receiver operating characteristic (ROC) curves to equate tests at 90% and 95% specificity.
Main Results:
- At 95% specificity, single-test sensitivities were 30% (SAP), 29% (SWAP), and 28% (FDT).
- Sensitivities decreased with same-test (24-27%) and different-test (20-23%) confirmation.
- SAP confirmed by SAP showed higher sensitivity than different-test combinations; SWAP/FDT were lower than same-test combinations.
Conclusions:
- Confirmation of visual field abnormality is critical for accurate glaucoma diagnosis.
- The most optimal confirmation strategy involves an abnormal standard automated perimetry (SAP) test followed by a repeat SAP or short-wavelength automated perimetry (SWAP) test.
