Double vision that resolves when either eye is closed is best described by which term?

Double vision that resolves when either eye is closed is best described by which term?

• A. Monocular
• B. Binocular
• C. Halos
• D. Total Blindness

Answer: (B)

Double vision that goes away when either eye is closed points to binocular diplopia. The two eyes are misaligned in binocular diplopia, so the brain has trouble fusing the images only when both eyes are open. When you cover one eye, you’re no longer relying on the misaligned pairing, and the diplopia disappears. If the double vision remained with one eye closed, it would be monocular diplopia, which comes from an issue in the optical system of the single eye (like a refractive error, cataract, or corneal irregularity). Halos describe light spread around lights and are not due to eye misalignment, and total blindness would not produce double vision.

Double vision that goes away when either eye is closed points to binocular diplopia. The two eyes are misaligned in binocular diplopia, so the brain has trouble fusing the images only when both eyes are open. When you cover one eye, you’re no longer relying on the misaligned pairing, and the diplopia disappears. If the double vision remained with one eye closed, it would be monocular diplopia, which comes from an issue in the optical system of the single eye (like a refractive error, cataract, or corneal irregularity). Halos describe light spread around lights and are not due to eye misalignment, and total blindness would not produce double vision.