Proximal accommodation is stimulated by cues when the target is at what distance?

Proximal accommodation is stimulated by cues when the target is at what distance?

• A. Closer than 3 meters
• B. Between 3 and 6 meters
• C. Beyond 6 meters
• D. At infinity

Answer: (A)

Proximal accommodation is the part of the focusing reflex driven by how near a target seems, based on distance cues rather than retinal blur alone. This proximal cueing becomes meaningful at near work distances, typically when the target is within about 3 meters. At these closer distances, the brain uses cues like looming and perceived proximity to increase accommodation, even if the retinal blur isn’t extreme. As the target moves farther away beyond roughly 3 meters, these proximal cues no longer strongly trigger the accommodative system, and the response relies more on blur-driven reflexes and vergence cues. So the closest targets—closer than 3 meters—are where proximal accommodation is stimulated, which is why that option is the best choice.

Proximal accommodation is the part of the focusing reflex driven by how near a target seems, based on distance cues rather than retinal blur alone. This proximal cueing becomes meaningful at near work distances, typically when the target is within about 3 meters. At these closer distances, the brain uses cues like looming and perceived proximity to increase accommodation, even if the retinal blur isn’t extreme. As the target moves farther away beyond roughly 3 meters, these proximal cues no longer strongly trigger the accommodative system, and the response relies more on blur-driven reflexes and vergence cues.

So the closest targets—closer than 3 meters—are where proximal accommodation is stimulated, which is why that option is the best choice.