Which device is noted for testing peripheral vision well?

• A. Humphrey Field Analyzer
• B. Amsler Grid
• C. Central California Screener
• D. Octopus 900

Answer: (D)

Testing peripheral vision relies on a perimetry device that maps the visual field beyond the central area. The Octopus 900 is particularly known for its wide-field, flexible testing capabilities, which let clinicians assess how well a person detects stimuli across a broad range of angles around fixation. This broad coverage is essential for identifying peripheral scotomas and for planning rehabilitation strategies that rely on intact versus impaired field areas.

In contrast, the Amsler Grid focuses on central vision and macular distortion, not the peripheral field. The Central California Screener is a quick screening tool that flags potential issues but does not provide detailed, full-field mapping. The Humphrey Field Analyzer is a widely used automated perimeter with solid threshold testing, mainly covering central to mid peripheral regions; while capable, it is not as explicitly optimized for expansive peripheral testing as the Octopus 900.