Frequency doubling technology perimetry with the Humphrey Matrix 30-2 test

Area of Science:

• Ophthalmology
• Visual Neuroscience
• Medical Imaging

Background:

• Glaucoma is a progressive optic neuropathy leading to characteristic visual field (VF) defects.
• Early detection of functional glaucomatous damage is crucial for timely intervention and vision preservation.
• Standard Automated Perimetry (SAP) is a common method, but its sensitivity in early stages is debated.

Purpose of the Study:

• To evaluate the diagnostic performance of the Humphrey Matrix 30-2 test in identifying functional glaucomatous damage.
• To compare the efficacy of Matrix 30-2 with Standard Automated Perimetry (SAP) and Frequency Doubling Technology (FDT) N-30.

Main Methods:

• A comparative study involving healthy individuals, patients with ocular hypertension (OHT), and primary open-angle glaucoma (POAG) (preperimetric and perimetric).
• Visual fields were assessed using SAP Humphrey Field Analyzer 30-2, FDT N-30, and Humphrey Matrix 30-2.
• Analysis included significantly abnormal points, testing time, sensitivity, specificity, and area under the receiver operating characteristic curve (AUC).

Main Results:

• FDT demonstrated a higher percentage of depressed points compared to SAP in OHT and preperimetric POAG eyes.
• The FDT-N-30 test identified a greater proportion of statistically significant VF defects (P < 5%) across OHT, preperimetric, and early POAG groups.
• Matrix-30-2 showed a slightly lower AUC than FDT-N-30 in preperimetric POAG but a significantly greater AUC in perimetric POAG.

Conclusions:

• FDT perimetry appears more sensitive than SAP for detecting early glaucomatous VF loss.
• The FDT-N-30 test exhibited a slightly superior ability to detect early glaucomatous damage in at-risk individuals.
• The Matrix-30-2 test provided a more detailed pattern of glaucomatous VF loss, albeit with a longer testing duration.