Influence of refractive correction on peripheral visual field in static perimetry

Area of Science:

• Ophthalmology
• Visual Science
• Optometry

Background:

• Refractive errors, such as myopia and hyperopia, can affect visual field testing.
• Automated static perimetry is a key diagnostic tool for assessing visual field sensitivity.
• Understanding the impact of refractive error on perimetry is crucial for accurate diagnosis.

Purpose of the Study:

• To investigate how refractive errors influence peripheral visual field thresholds.
• To assess the effect of contact lens correction on perimetric results in individuals with refractive errors.

Main Methods:

• 47 subjects (16-49 years) with refractive errors ranging from -16.75 to +12.5 diopters participated.
• Peripheral visual field thresholds were measured with and without contact lens correction using automated static perimetry (Octopus 2000 R).
• Testing involved Goldmann stimulus size III at 64 locations across three rings (30-50 degrees eccentricity).

Main Results:

• Myopic eyes showed a significant influence of refractive error on peripheral visual field sensitivity across all tested rings.
• Hyperopic eyes exhibited a significant influence only in the inner ring.
• Sensitivity decrease per diopter was reported for different rings in both myopic and hyperopic eyes.

Conclusions:

• A significant association exists between refractive errors and peripheral visual field sensitivity, particularly in myopic eyes.
• Contact lens wear is advised during automated perimetry for myopic patients with higher refractive errors to ensure accuracy.
• Accurate refractive correction is essential for reliable peripheral visual field assessment.