What visual ability is primarily affected in amblyopia?

Amblyopia, often referred to as "lazy eye," primarily affects the sharpness of vision in one eye. This condition occurs when the brain does not fully acknowledge the visual input from one eye, leading to a decrease in visual acuity in that eye. As a result, the affected eye may struggle to achieve optimal clarity and focus compared to the other eye. This decreased sharpness can significantly impact activities requiring detailed vision, such as reading or recognizing faces.

In contrast, the other visual abilities listed, such as color detection, depth perception, and movement detection, can still be relatively intact, even in the presence of amblyopia. Therefore, while these other abilities may be influenced by the overall visual experience, the hallmark of amblyopia is the compromised visual sharpness in the affected eye.