**Core Concept**
Simultaneous perception in binocular vision refers to the ability to perceive a single, unified visual image from two slightly different images received by each eye. This phenomenon is made possible by the brain's ability to combine the two images and create a single, coherent visual perception. The underlying principle is the fusion of binocular disparity, which is the difference in the images received by each eye due to the slight difference in their positions.

**Why the Correct Answer is Right**
The correct answer is the result of the brain's processing of the two images received by each eye. The brain uses the information from both eyes to calculate the depth and distance of objects in the visual field. This is achieved through the fusion of the images, which allows the brain to create a single, unified visual perception. The process involves the coordinated activity of neurons in the visual cortex, particularly in the primary visual cortex (V1) and the secondary visual cortex (V2).

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the mechanism of simultaneous perception in binocular vision. While convergence of the eyes is important for binocular vision, it is not the primary mechanism for simultaneous perception.
**Option B:** This option is incorrect because it is a distractor that refers to a different aspect of binocular vision, specifically the ability to see depth. While this is related to binocular vision, it is not the same as simultaneous perception.
**Option C:** This option is incorrect because it is a distractor that refers to a different aspect of visual perception, specifically the ability to see movement. While this is an important aspect of visual perception, it is not related to simultaneous perception in binocular vision.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that simultaneous perception in binocular vision is a complex process that involves the coordinated activity of neurons in the visual cortex. This process can be disrupted in conditions such as amblyopia, where the brain has difficulty combining the images from each eye.

**Correct Answer:** C. Convergence of the eyes.