ArticleGraefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie2026
Usefulness of a simplified self-checking tool (Quattro Checker®) for visual field defects in glaucoma patients.
Article in Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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6 authors.
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Abstract
purposeTo develop and evaluate iPad Quattro Checker® (iPad QC®), a tablet-based screening tool for detecting glaucomatous visual field (VF) abnormalities.
methodsWe evaluated three screening methods-the iPad QC®, paper-based Quattro Checker® (paper QC®), and CLOCK CHART®-in glaucoma patients across disease stages (n = 64) and in normal participants (n = 38). VF abnormalities were defined in relation to corresponding quadrants of the Humphrey Field Analyzer (HFA). Sensitivity, specificity, and the area under the receiver operating characteristic curve (AUC) were calculated.
resultsAmong all patients, the AUCs of the iPad QC®, paper QC®, and CLOCK CHART® were 0.97, 0.94, and 0.96, respectively. The iPad QC® retained 80.2% sensitivity in early glaucoma, with an AUC of 0.90 (95% CI: 0.81-0.98). More than half of previously unaware patients recognized their VF deficits using the iPad QC®. Testing required only a few minutes, could be self-administered on a widely available tablet, and was performed under ordinary room lighting.
conclusionThe iPad QC® demonstrated high sensitivity for detecting visual field abnormalities even in the early stages of glaucoma. Its capability for self-testing using widely available tablet devices, along with its ability to raise patients' awareness of VF defects, further enhances its usefulness as a practical screening tool.
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