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Comparison of Advanced Threshold and SITA Fast Perimetric Strategies.

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The PTS 2000 Advanced Threshold (ADV) strategy is faster than Humphrey SITA Fast (SFA) for visual field assessment in glaucoma patients and healthy subjects. Both strategies effectively identify glaucomatous defects with high sensitivity.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Medical Technology

Background:

  • Glaucoma is a leading cause of irreversible blindness worldwide.
  • Early detection of glaucomatous visual field defects is crucial for timely intervention.
  • Automated static perimetry is a standard method for visual field assessment.

Purpose of the Study:

  • To compare the Humphrey SITA Fast (SFA) and PTS 2000 Advanced Threshold (ADV) strategies for visual field assessment.
  • To evaluate test duration, global indices, sensitivity, and specificity of SFA and ADV in healthy subjects and glaucoma patients.

Main Methods:

  • A comparative study involving 53 healthy volunteers and 69 glaucoma patients.
  • One eye per participant was tested using both SFA and ADV strategies.
  • Quantitative comparison of test duration and global indices (MS, MD, PSD) using correlation coefficients.
  • Evaluation of sensitivity and specificity based on GHT and adjusted Anderson-Patella (A&P) criteria.

Main Results:

  • ADV demonstrated shorter test durations (5% in healthy, 18% in glaucoma patients).
  • High correlation between SFA and ADV global indices (MS, MD, PSD).
  • SFA showed slightly higher areas under the ROC curve for MD and PSD compared to ADV.
  • GHT-based sensitivity was 92.75% for both, while SFA specificity (90.57%) was higher than ADV (77.36%).

Conclusions:

  • Both SFA and ADV effectively identify glaucomatous defects within 5 minutes.
  • ADV is significantly faster than SFA.
  • High correlation exists between global indices from both strategies.
  • Both strategies exhibit very high sensitivity using GHT and A&P criteria.