Detecting and Quantifying Glaucomatous Visual Function Loss With Continuous Visual Stimulus Tracking: A Case-Control...

Area of Science:

• Ophthalmology
• Neuroscience
• Visual Science

Background:

• Standard automated perimetry (SAP) is the current method for visual function screening.
• Continuous visual stimulus tracking offers a simplified, intuitive alternative for visual function assessment.

Purpose of the Study:

• To determine if tracking performance can detect and quantify glaucomatous visual field loss compared to SAP.
• To investigate if continuous visual stimulus tracking exhibits a learning effect.

Main Methods:

• 36 glaucoma patients and 36 controls tracked a moving stimulus at varying contrast levels.
• Eye movements were recorded to assess tracking performance (gaze vs. stimulus position).

Main Results:

• Glaucoma significantly reduced tracking performance, especially in severe cases.
• Distinguishing between groups was contrast-dependent; early glaucoma differed from controls only at 40% contrast.
• Tracking performance correlated best with SAP Mean Sensitivity at 160% contrast; no learning effect was observed.

Conclusions:

• Continuous visual stimulus tracking can detect and quantify glaucomatous visual field loss.
• This technique is a promising, easy, and fast tool for glaucoma diagnosis and monitoring.