Feasibility, Accuracy, and Repeatability of Suprathreshold Saccadic Vector Optokinetic Perimetry

Area of Science:

• Ophthalmology
• Neuroscience
• Medical Technology

Background:

• Visual field testing is crucial for diagnosing and monitoring neurological and ophthalmological conditions.
• Traditional perimetry methods like Humphrey Field Analyzer (HFA) have limitations, particularly in pediatric populations.
• Saccadic Vector Optokinetic Perimetry (SVOP) is an emerging technology aiming to provide an alternative visual field assessment.

Purpose of the Study:

• To assess the feasibility, accuracy, and repeatability of suprathreshold SVOP.
• To compare SVOP performance against the established HFA perimetry.
• To establish a benchmark for future development of SVOP technology.

Main Methods:

• The study included adult and child subjects, both healthy and with suspected visual field defects.
• Suprathreshold SVOP and HFA testing were performed using the C-40 test pattern.
• Feasibility was determined by protocol completion rates; accuracy and repeatability were evaluated by comparing results and using Cohen's kappa coefficient.

Main Results:

• 82% of subjects completed the full testing protocol.
• SVOP showed high accuracy (90.9% sensitivity, 88.5% specificity) and excellent repeatability (kappa=0.87) for visual field pattern analysis in adults.
• While HFA reliability was limited in child patients, SVOP demonstrated substantial repeatability for individual test point outcomes (kappa=0.62).

Conclusions:

• Suprathreshold SVOP is a feasible and accurate method for visual field assessment in adults.
• SVOP technology shows promise and requires further investigation in pediatric patient groups.
• This study provides valuable data for the ongoing development and refinement of SVOP systems.