Double vision limited to one eye due to lens, cornea, or retinal changes is best described by which term?

Double vision limited to one eye due to lens, cornea, or retinal changes is best described by which term?

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

Answer: (A)

Double vision that is seen in only one eye indicates a problem inside that eye’s optical system rather than a misalignment between the two eyes. When the eye itself has an abnormality in the cornea (irregular surface), the lens (cataract or lens displacement), or the retina (macular or other retinal changes), the image from that eye is not formed properly, so you end up with two images from that single eye. This is monocular diplopia. If the diplopia were due to the eyes not working together (binocular diplopia), it would typically be present when both eyes are open and would not persist if you used only one eye. The other terms listed describe different phenomena: halos are light-spreading disturbances around lights, and total blindness means complete loss of vision.

Double vision that is seen in only one eye indicates a problem inside that eye’s optical system rather than a misalignment between the two eyes. When the eye itself has an abnormality in the cornea (irregular surface), the lens (cataract or lens displacement), or the retina (macular or other retinal changes), the image from that eye is not formed properly, so you end up with two images from that single eye. This is monocular diplopia. If the diplopia were due to the eyes not working together (binocular diplopia), it would typically be present when both eyes are open and would not persist if you used only one eye. The other terms listed describe different phenomena: halos are light-spreading disturbances around lights, and total blindness means complete loss of vision.