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Increasing the Spatial Resolution of Visual Field Tests Without Increasing Test Duration: An Evaluation of ARREST.

Vasanth Muthusamy¹, Andrew Turpin², Mark J Walland³

¹Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia.

Translational Vision Science & Technology

|December 28, 2020

Summary

The Australian Reduced Range Extended Spatial Test (ARREST) improves visual field testing by adding spatial detail without increasing test time. This empirical study confirms ARREST

Keywords:

perimetry spatial resolution test duration test grids visual fields

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Area of Science:

Ophthalmology and Visual Science
Medical Technology and Instrumentation

Background:

Current visual field testing algorithms aim for efficiency but may lack detailed spatial resolution.
The Australian Reduced Range Extended Spatial Test (ARREST) was developed to enhance spatial sampling in visual field testing.
Previous evaluations of ARREST relied on computer simulations.

Purpose of the Study:

To empirically assess the performance of the ARREST approach in individuals with existing visual field loss.
To compare the spatial resolution and test duration of ARREST against established clinical methods.

Main Methods:

Cross-sectional study involving 23 participants with glaucoma and visual field loss.
Three visual field tests were conducted: ARREST and cZEST on the Octopus 900 perimeter, and a best available estimate (BAE) on the Compass perimeter.
Comparison of ARREST performance against cZEST and BAE for threshold values below 17 dB.

Main Results:

ARREST incorporated an average of seven new spatial locations per test, ranging from 0 to 15.
No significant difference in the total number of stimulus presentations was observed between ARREST and cZEST (mean 259 vs. 261 presentations).
ARREST demonstrated comparable performance to the BAE in classifying threshold values below 17 dB.

Conclusions:

Empirical evidence supports previous simulation findings that ARREST enhances spatial sampling in critical visual field areas.
ARREST successfully increases spatial resolution without extending the overall test duration.
ARREST offers a valuable augmentation to current visual field testing, providing a more detailed spatial description of defects.