Double vision that affects only one eye can be caused by changes to the lens, cornea, or retina. Which term is this?

Double vision that affects only one eye can be caused by changes to the lens, cornea, or retina. Which term is this?

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

Answer: (A)

Diplopia is evaluated by whether the double vision persists when you use only one eye. If the double vision is present with just one eye open, it points to issues inside that eye’s optical path—like the lens, cornea, or retina. Changes in the lens (such as cataract-related changes), irregularities or scars on the cornea, or retinal problems can cause the eye to form a second image, leading to monocular diplopia. If the double vision goes away when one eye is closed, it’s due to misalignment between the eyes (binocular diplopia) rather than something wrong inside one eye. Since this scenario involves double vision that affects only one eye, the term is monocular.

Diplopia is evaluated by whether the double vision persists when you use only one eye. If the double vision is present with just one eye open, it points to issues inside that eye’s optical path—like the lens, cornea, or retina. Changes in the lens (such as cataract-related changes), irregularities or scars on the cornea, or retinal problems can cause the eye to form a second image, leading to monocular diplopia. If the double vision goes away when one eye is closed, it’s due to misalignment between the eyes (binocular diplopia) rather than something wrong inside one eye. Since this scenario involves double vision that affects only one eye, the term is monocular.