Quantitative evaluation of manual kinetic perimetry using computer simulation.

Area of Science:

• Ophthalmology
• Visual Science
• Medical Simulation

Background:

• Manual kinetic perimetry is crucial for diagnosing visual field loss in conditions like glaucoma.
• Previous studies on kinetic perimetry's accuracy and reproducibility have yielded conflicting results.
• The influence of specific patient response characteristics on test variability remained unclear.

Purpose of the Study:

• To investigate the impact of controlled patient factors on the performance of manual kinetic perimetry.
• To evaluate the accuracy and efficiency of kinetic perimetry under simulated patient conditions.
• To assess the utility of a computer simulation as a training tool for perimetry technicians.

Main Methods:

• Utilized the KRAKEN computer simulation program to conduct 36 manual kinetic perimetry examinations per technician.
• Simulated normal and abnormal visual fields with varying patient response errors and sensitivity fluctuations.
• Measured performance metrics including time, boundary plots, error rates, and technician-rated patient cooperation/reliability.

Main Results:

• Accuracy varied significantly based on visual field location (central vs. peripheral, superior vs. inferior).
• Test efficiency was significantly affected by patient cooperation, visual field status (normal vs. abnormal), and technician experience.
• Judged patient cooperation correlated well with simulated patient reliability.

Conclusions:

• Patient cooperation is a critical factor influencing the efficiency and accuracy of manual kinetic perimetry.
• The KRAKEN simulation program shows potential as an effective training tool for developing perimetry skills.
• Understanding and controlling patient factors can improve the reliability of visual field testing in clinical practice.