Establishing the threshold prior to single and multiple stimulus supra-threshold strategies

Area of Science:

• Ophthalmology
• Visual Psychophysics

Background:

• Supra-threshold strategies are crucial for efficient visual field testing.
• Understanding the comparability of different supra-threshold methods is essential for accurate diagnosis and monitoring.

Purpose of the Study:

• To determine if single and multiple stimulus supra-threshold strategies yield comparable threshold values.
• To assess if data from these strategies can be directly compared without intensity compensation.

Main Methods:

• Seventy-nine subjects underwent visual field testing using a Henson 4000 perimeter.
• Both single stimulus and multiple stimulus supra-threshold strategies were employed.

Main Results:

• The multiple stimulus strategy yielded threshold values that were, on average, 0.095 dB higher than the single stimulus strategy.
• The observed difference between the two strategies was statistically insignificant for practical purposes.

Conclusions:

• The minimal difference between single and multiple stimulus supra-threshold strategies allows for direct comparison of results.
• No compensation for supra-threshold test intensity is required when comparing data from these two visual field testing methods.