What is the visual condition characterized by loss of binocular vision?

The visual condition characterized by loss of binocular vision is amblyopia. Amblyopia, also known as "lazy eye," occurs when one eye does not develop normal visual acuity, leading to reduced vision that cannot be corrected fully with glasses or contact lenses. This can result in difficulty coordinating the eye movements required for binocular vision; thus, one eye may dominate in visual processing, whereas the other eye is underutilized.

Strabismus, often confused with amblyopia, refers to misalignment of the eyes, where they do not point in the same direction. While strabismus can lead to amblyopia due to the brain suppressing the input from the misaligned eye to avoid double vision, it is not defined by a loss of binocular vision on its own.

Hyperopia and myopia are types of refractive errors affecting how light focuses on the retina, leading to difficulty seeing at far distances or close distances, respectively. These conditions do not inherently impact binocular vision, which is more about how well the two eyes work together rather than the clarity of vision in each individual eye.