The perception of two images of a single object, also known as double vision, is called what?

The perception of two images of a single object, also known as double vision, is called what?

• A. Diplopia
• B. Photophobia
• C. Presbyopia
• D. Esotropia

Answer: (A)

Double vision, or seeing two images of a single object, occurs when the eyes can’t align or the brain can’t fuse the two eye images into one. The medical word for this phenomenon is diplopia. It can arise from both eyes not aiming in the same direction (binocular diplopia) or from an issue in one eye that creates a ghost image (monocular diplopia). The other terms describe different eye problems: photophobia is sensitivity to light; presbyopia is age-related difficulty focusing on near objects; esotropia is when one eye turns inward. So the term that specifically means double vision is diplopia.

Double vision, or seeing two images of a single object, occurs when the eyes can’t align or the brain can’t fuse the two eye images into one. The medical word for this phenomenon is diplopia. It can arise from both eyes not aiming in the same direction (binocular diplopia) or from an issue in one eye that creates a ghost image (monocular diplopia). The other terms describe different eye problems: photophobia is sensitivity to light; presbyopia is age-related difficulty focusing on near objects; esotropia is when one eye turns inward. So the term that specifically means double vision is diplopia.