Which term is used to describe a misalignment of the eyes leading to a lack of binocular vision?

The term that describes a misalignment of the eyes, leading to a lack of binocular vision, is strabismus. Strabismus occurs when the eyes do not properly align with each other when looking at an object. This misalignment can result in one eye turning in, out, up, or down while the other eye focuses straight ahead. As a result, the brain may receive two different images, which can inhibit binocular vision, making it difficult for an individual to coordinate visual information from both eyes effectively.

In contrast, amblyopia refers to a condition often resulting from strabismus where one eye does not develop proper vision, leading to reduced visual acuity in that eye. Hyperopia and myopia are terms that describe refractive errors in vision—hyperopia is farsightedness, while myopia is nearsightedness—not related to eye alignment issues. Therefore, strabismus is the most accurate term for the misalignment of the eyes impacting binocular vision.