What do the printed circles on a visual field chart represent?

The printed circles on a visual field chart are used to represent circles of eccentricity at 10-degree intervals. These circles serve a crucial purpose in helping clinicians evaluate the extent and sensitivity of a patient's visual field. Each circle indicates a specific angular distance from the fixation point, allowing for a standardized method to assess peripheral vision and identify any potential abnormalities. The information gathered from these intervals helps in diagnosing various visual field defects and aids in creating an effective treatment plan for patients.

Understanding the representation of eccentricity is fundamental in visual field testing, as it provides clinicians with a clear and organized way to interpret the results relative to normal visual field measures. This allows for a more comprehensive analysis of visual function as well as comparative assessments between examinations.