Specificity of the Program Threshold Noiseless Trend for Perimetric Progression Analysis

Abstract

The specificity of TNT may be considered to be over 95% with a large number of examinations, and 90-100% with fewer examinations. At least five examinations are required for a basic interpretation of progression, and preferably more than six to guarantee the specificity of the result.

Detection of morphological and functional progression in initial glaucoma

“…For the number of examinations performed, a specificity >95% is to be expected for TNT 12 19. This, and the relative agreement in diagnoses of progression, suggests that TNT manages to detect progression more efficiently than the other procedures analysed.…”

Evaluation of Visual Field Progression in Glaucoma: Quasar Regression Program and Event Analysis

“…These include the Progressor program, Bebie curve sector analysis and Threshold Noiseless Trend (TNT). [4][5][6] These programs employ mathematical filtering techniques that reduce threshold variability and visual field fluctuation, thus improving the detection of glaucomatous progression.…”