Assessment of the Field of Single Binocular Vision
The field of single binocular vision may be tested using a Goldmann perimeter. This assessment is useful for following recovery of a paretic muscle or measuring the outcome of surgery to alleviate diplopia. A small, white test object is followed by both eyes in the cardinal positions throughout the visual field. When the patient indicates that the test object is seen double, the point is plotted. The field of binocular vision normally measures about 45°–50° from the fixation point except where it is blocked by the nose (Fig 7-14). Weighted templates reflecting the greater importance of single binocular vision in primary and reading positions can be used to quantify the findings.
Figure 7-14 The normal field of single binocular vision.
Sullivan TJ, Kraft SP, Burack C, O’Reilly C. A functional scoring method for the field of binocular single vision. Ophthalmology. 1992;99(4):575–581.
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.